We have the points as;
(-4,0) , (-3,-8) , (-2,-12) , (-1,-12) , (0,-8) , (1,0) , (2,12) , (3,28) and (4,48)
Here, we want to get the output y values
We can get this by substituting each of the x-values
when x = -4
2(-4)^2 +6(-4) -8 = 32-24-8 = 0
Notation is (-4,0)
a) when x = -3
2(-3)^2 + 6(-3)-8 = 18 - 18-8 = -8
Notation is = (-3,-8)
b)when x = -2
2(-2)^2 +6(-2)-8 = 8-12-8 = -12
Notation is (-2,-12)
c) when x = -1
2(-1)^2 +6(-1)-8 = 2-6-8 = -12
Notation is (-1,-12)
d) when x = 0
2(0)^2 +6(0)-8 = -8
Notation is (0,-8)
e) when x = 1
2(1)^2 +6(1)-8 = 2+6-8 = 0
Notation is (1,0)
f) when x = 2
2(2)^2+6(2)-8 = 8+12-8 = 12
Notation is (2,12)
g) when x = 3
2(3)^2 + 6(3) - 8 = 18+18-8 = 28
Notation is (3,28)
h) when x = 4
2(4)^2+6(4) -8 = 32+24 -8 = 48
Notation is (4,48)
