The answer would be b and c because they are the same. B in the y=Mx+b is the y intercept and the table shows the y intercept is 6. Also for every unit that x increases by y increases by 0.5 so that is why b and c would be correct.
(x + 8)(x - 8)
x(x - 8) + 8(x - 8) =
x^2 - 8x + 8x - 64 =
x^2 - 64 <===
I'm pretty sure it's 1/12, please don't be mad if I got it wrong