Tell whether the ordered pairs are a solution for the equation.

1. y=4x+7; (4,20), (-2,-1)

If it is a solution, then when inputed, it will yeild a true statement

it is in (x, y) form so

(4,20)

if x=4 and y=20

y=4x+7

20=4 (4) + 7

20=16+7

20=23

false so this does not work

(-2,-1)

x=-2

y=-1

-1=4 (-2) + 7

-1=-8+7

-1=-1

true

the answer is (-2,-1)

(4, 20)

y = 4x + 7

y = 4 (4) + 7

y = 16 + 7

y = 23

y = 4x + 7

20 = 4x + 7

- 7 - 7

13 = 4x

4 4

2.25 = x

y = 4x + 7

20 = 4 (4) + 7

20 = 16 + 7

20 ≠ 23

(-2, - 1)

y = 4x + 7

y = 4 (-2) + 7

y = - 8 + 7

y = - 1

y = 4x + 7

-1 = 4x + 7

- 7 - 7

-8 = 4x

4 4

-2 = x

y = 4x + 7

-1 = 4 (-2) + 7

-1 = - 8 + 7

-1 = - 1

It is equal to (-2, - 1).