Question

Find three solutions of the equation.

y = 3x + 4
a. (-2,-2), (1,7), (2, 11)
b. (0,4), (3, 11), (-2,-2)
c.
d.
(-2,-2), (1, 7), (0, 4)
(1,7), (0,4), (-1,0)

Answer 1

c. (-2,-2), (1, 7), (0, 4)

Explanation:

you can compare all answers for each (x,y) pair:

does y = 3x + 4?

(-2,-2)--> -2 = 3(-2) + 4 --> -2 = -6 + 4 = true

(1, 7) --> 7 = 3(1) + 4 --> 7 = 3 + 4 = true

(2, 11) --> 11 = 3(2) + 4 --> 11 = 6 + 4 = false

(0, 4) --> 4 = 3(0) + 4 --> 4 = 0 + 4 = true

(3, 11) --> 11 = 3(3) + 4 --> 11 = 9 + 4 = false

(-1, 0) --> 0 = 3(-1) + 4 --> 0 = -3 + 4 = false.

only (-2,-2), (1, 7), (0, 4) are true.