Question

The quadratic regression equation f(x)=2.55x² −50.66x+801.46 models the relationship between the model.

What does the coefficient 2.55 represent in this quadratic regression equation?

a. The y-intercept of the quadratic model.
b. The axis of symmetry of the parabolic curve.
c. The rate of change of the quadratic function.
d. The vertex of the parabola.

Answer 1

The coefficient 2.55 in the quadratic regression equation represents the rate of change of the quadratic function.

Step-by-step explanation:

The coefficient 2.55 in the quadratic regression equation represents the rate of change of the quadratic function. It determines how quickly the values of y change as x increases or decreases. In this case, for every unit increase or decrease in x, the value of y will change by 2.55 times the square of the change in x.