Question

已知正比例函数y=kx,当x=-2时,y=6.

Answer 1

(1) y=kx

6=k(-2)

k=-3

(2) y=-3x过(0,0)和(1,-3),将这两点连接起来的直线就是y=-3x的图象

(3) x=-3

y=-3(-3)=9

(4) y=-3

-3=-3x

x=1