Volume? Correct answers please

Which of the following is the formula for the sequence graphed below

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?