y = -3x + 4
We need to find the values of y at x = -1, 0, 1, 2
x = -1
Substitute x in the equation above by -1
y = -3(-1) + 4
-3(-1) = 3
y = 3 + 4 = 7
at x = -1 , y = 7
x = 0
Substitue x by 0
y = -3(0) + 4
(-3)(0) = 0
y = 0 + 4 = 4
at x = 0, y = 4
x = 1
Substitute x by 1
y = -3(1) + 4
-3(1) = -3
y = -3 + 4 = 1
at x = 1, y = 1
x = 2
Substitute x by 2
y = -3(2) + 4
-3(2) = -6
y = -6 + 2 = -2
at x = 2