Question

If a line contains the point (0, -1) and has a slope of 2, then which of the following points also lies on the line?

(2, 1)
(1, 1)
(0, 1)

Answer 1

y = mx + b
-1 = 2*0 + b

y=2x - 1
now check
(2, 1)
y = 2*2 -1 = 3 doesnt work
(1, 1)
y = 2*1 -1 =1 works
(0, 1)
y = 2* 0 -1 = -1 doesnt work