What is the value of y in y+4x =9, when x = -2, 0, 3?

1 Answer
Sep 15, 2017

when x = -2, y = 17
when x = 0, y = 9
when x = 3, y = -4

Explanation:

Rearrange the equation by isolating y then plugin either -2, 0 or 3 for where x, since x equals those values

Rearrange first,
y = -4x + 9

  • When x = -2,
    y = -4(-2) + 9
    y = 8 + 9
    y = 17

  • When x = 0
    y = -4(0) + 9
    y = 9

  • When x = 3
    y = -4(3) + 9
    y = -12 + 9
    y = -4

Therefore
when x = -2, y = 17
when x = 0, y = 9
when x = 3, y = -4