Answer:
A. f(0)
Plug 0 in as x in the equation;
y = 2(0)^2 - 1
y = -1
B. f(8)
Plug 8 in as x in the equation;
y = 2(8)^2 - 1
y = 2 * 64 - 1
y = 128 - 1
y = 127
C. f(-3)
y = 2(-3)^2 - 1
y = 2 * 9 - 1
y = 18 - 1
y = 17
D) x = -2, f(-2)
y = 2(-2)^2 - 1
y = 2 * 4 - 1
y = 8 - 1
y = 7
BTW -
you could've used the chart on the left.
The chart states the x values and gives you some y values,
and the y values are the answers to the function.
Lets say for x = -3, x(-3), on the chart it says y = 17, like in my answer.
I just showed the work ;)