(F. LE.5} The function f(x) = 7.75x models the amount of money that Jimearns for each hour of work. What does the value "x" stand for?A. There is no initial amount of money he gets paid prior to startingB. His hourly wageC. His total amount he gets paid for the day D. The number of hours Jim has worked

Explanation

Given the model

The value of x signifies the number of hours Jim has worked.

Option D

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this