Help me it is due in 30min

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36