For a parabola in a normal position ... with its nose either straight up or straight down ...
the x-value of the vertex is midway between the zeros of the function, i.e. their average.
It seems there is a misunderstanding in your question regarding the vertex and the coefficients. The vertex of a parabola in standard form is typically given as ((h, k)), where ((h, k)) is the vertex point. If the vertex is ((-4, -1)) and the y-value is 0 when x is 2, we can derive the coefficient of the squared term by using the vertex form of a parabola. However, without additional information, such as another point on the parabola or the specific equation, we can't definitively determine the coefficient from the options provided (6, -6, -3, or 3).
To find the slope of a non-vertical line you need two points on the line. Subtract the second y-value from the first y-value, and subtract the second x-value from the first x-value, then divide the first number calculated by the second number calculated. As a formula, it looks like this: slope = (first yvalue - second yvalue) / (first xvalue - second xvalue) Alternatively, if you know calculus, the slope at some x-coordinate a of the function f(x) = d/dx[f(x)] evaluated at a = f'(a).
You will pay less for the paint because you used the coupon than if you didn't use the coupon to buy the paint.Price of paint equals XValue of coupon equals YTotal price of paint equals X minus Y