Which function models the area of a rectangle with side lengths of 2x - 4 units and x + 1 units?

D. f(x) = 2x^2 − 2x − 4; A = 8

Step-by-step explanation:

The area of a rectangle is given by the formula length x wide.

In this case we have that the length is 2x -4 and the wide is x +1

Therefore, the area will be:

Now, when x = 3 we would have:

Thus, the right answer is D.