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1、名师精编优秀教案一次函数师生共用导学案年级:八年级学科:数学课型:新授课时间:20XX年 10 月 27 日内容:一次函数执笔:试做:审核:二次备 课【学习目标】利用一次函数知识解决相关实际问题【重点】学会识图,利用一次函数知识解决相关实际问题【难点】利用一次函数知识解决相关实际问题一、学前准备1直线 y2x3 与 x 轴交点坐标为,与 y 轴交点坐标为,图象经过第象限,y 随 x 增大而2.一次函数ykx b(k 0)的图象,当k0,b0 时,经过象限;当 k0,b0 时,经过象限;当k0,b0 时,经过象限;当k0,b0 时,经过象限二、探究活动:例 1:某种摩托车的油箱最多可储油10升,
2、加满油后,油箱中的剩余油量y(升)与摩托车行驶路程x(千米)之间的关系如图:根据图象回答下列问题:21436587109x/千米y/升100 200 300 400 5000(1)一箱汽油可供摩托车行驶多少千米?(2)摩托车每行驶100 千米消耗多少升汽油?(3)油箱中的剩余油量小于1 升时,摩托车将自动报警。行驶多少千米后,摩托车将自动报警名师精编优秀教案例2:我边防局接到情报,近海处有一可疑船只A正向公海方向行驶,边防局迅速派出快艇B追赶,如图中 s1与s2分别表示两船只相对于海岸的距离s(海里)与追赶时间t(分)之间的关系。214365871092460810s1s2t/分s/海里(1)
3、哪条线表示B 到海岸的距离与追赶时间之间的关系?(2)A,B 哪个速度快?(3)15 分内 B 能否追上A?(4)如果一直追下去,那么 B 能否追上 A?(5)当 A 逃到离海岸的距离12 海里的公海时,B 将无法对其进行检查.照此速度,B 能否在 A 逃入公海前将其拦截?例3:如图,y1反映了某公司产品的销售收入与销售量之间的关系,y2反映了该公司产品的销售成本与销售量之间的关系,根据图意填空:X吨0 1 2 3 4 5 6 7 8600010002000300040005000(1)当销售量为 2吨时,销售收入=_元,销售成本=_ 元;(2)当销售量为 6吨时,销售收入=_元,销售成本=_
4、元;(3)当销售量等于 _时,销售收入等于销售成本y1y2Y元(4)当销售量 _时,该公司赢利(收入大于成本);当销售量 _时,该公司亏损(收入小于成本)文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F
5、3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE
6、1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H
7、2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ
8、10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N1
9、0E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文
10、档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1名师精编优秀教
11、案例 4.A 城有肥料 200吨,B 城有肥料 300 吨,现要把这些肥料全部运往C,D 两乡 从A 城往 C,D 两乡运肥料的费用分别为每吨20 元和 25 元;从 B 城往 C、D 乡运肥料的费用分别为每吨15 元和 24 元,现 C 乡需要肥料240 吨,D 乡需要肥料260 吨,怎样调运可使总运费最小?三,巩固提升1.某气象研究中心观察一场沙尘暴从发生到结束的全过程,开始时风速平均每小时增加2km/h,经过开阔荒漠地,风速变为平均每小时增加4km/h,一段时间,风速保持不变。当沙尘暴遇到绿色植被区时,其风速平均每小时减少1km/h,最终停止。结合风速与时间地图象,回答下列问题:(1),
12、在 y轴()处填入相应的数值;(2)求出当 x25时,风速 y(km/h)与时间 x(h)之间的函数关系式。(3)沙尘暴从发生到结束,共经过多少小时?x(h)y(km)041025()()ABCD11cm14cm7.如下图,两摞相同规格的碗整齐地放在桌面上,请根据图中的数据信息,解答下列问题:(1)求整齐摆放在桌面上的碗的高度y(cm)与碗的个数 x(个)之间的函数关系式;(2)把这两摞碗整齐地摆成一摞时,碗的高度是多少?文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编
13、码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S
14、6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y
15、6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W
16、9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R
17、7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10
18、W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E
19、3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1名师精编优秀教案文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N1
20、0E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文
21、档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD
22、4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F
23、3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE
24、1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H
25、2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1文档编码:CD4S6R9F3Y6 HE1W9O2H2R7 ZZ10W2N10E3X1