[問題]GWD7-28

[blacklilu]

:-$ 又來問了~~還請各位幫忙呀
Q28:
A straight line in the xy-plane has a slope of 2 and a y-intercept of 2. On this line, what is the x-coordinate of the point whose y-coordinate is 500 ?

A. 249
B. 498
C. 676
D. 823
E. 1,002

Ans : A

[huacy]

斜率為 2 代表y/x=2 加上截距為2
所以公式應該是 y=2x+2

所以當 y=500 時 x=(500-2)/2=249

[Quinton]

幫站大頂一下！！
(y)

[shine_allen]

什麼是截距