Question

Does the point (-1, 2) make the following equations true? i) y = -2x ii) y = x + 3

Answer 1

true

Explanation:

first, you take the y = -2x and plug that into y = x + 3. so your equation should be -2x = x + 3. you then solve for x which comes out to be -1. you then plug the -1 into y = -2x. your equation should be y = -2(-1). solve for y which equals 2. the point that you got from both equations matches the point from the equation given so it is true.

Answer 2

i) True

ii) True

Explanation:

Given :-

Point (-1, 2)

To Find :

Whether the point is a solution of :

1. y = -2x
2. y = x + 3

Solving :-

Substitute the value of the point in each of the equations.

=> y = -2x

=> 2 = -2(-1)

=> 2 = 2 [∴ The point makes it true]

=> y = x + 3

=> 2 = -1 + 3

=> 2 = 2 [∴ The point makes it true]