x | - 8 - 4 0 4 8
y | 28 16 4 - 8 - 20
to calculate the values of y, substitute the given values of x into the equation
x = - 8 : y = (- 3 × - 8 ) + 4 = 24 + 4 = 28
x = - 4 : y = (- 3 × - 4 )+ 4 = 12 + 4 = 16
x = 0 : y = (- 3 × 0 ) + 4
0 + 4 = 4
x = 4 : y = (- 3 × 4 ) + 4 = - 12 + 4 = - 8
x = 8 : y = (- 3 × 8 ) + 4 = - 24 + 4 = - 20
