when a plumber is called, the cost of the service call is $75.00 for him to show up at your house, plus an additional $20.00 per hour. which part corresponds to x and which part corresponds to y

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