Question

Find three solutions of the equation.
y = –2x

a.(0, 0), (3, –8), (–2, –4)
b.(1, –2), (0, 0), (–1, 1)
c.(–2, 4), (1, –2), (0, 0)
d.(–2, 4), (1, –2), (2, –3)

Answer 1

A tip. Substitute the x value and the y value and see if LHS = RHS.

Eg
In y =-2x
Substitute
1) (0,0)

0 = -2(0)
0 = 0
LHS = RHS
Hence correct that (0,0) lies on the line


Eg 2
(3,-8)

-8 = -2(3)
-8 = -6 ===> False

So (3,-8) is not a point on the line y=-2x

So option A is invalid

Similarly try for options B, C, D

Answer 2

just plug those points in each choice. if they all result in a true statement, then that's the choice.

Answer 3

Find three solutions of the equation.
Y=-2x-1