Unit Test — Unit test Answers

A function models the growth of a sample starting with 40 bacteria with the ability to double every two hours. Which graph models the function?

An algebra tile configuration. Only the Product spot is shown. 8 tiles are in the Product spot in 3 columns with 3 rows. First row: 1 + x squared, 2 + x. Second row: 1 +x, 2 +. Third row: 1 +x, 1 +.

The function f(x) = −(x + 5)(x + 1) is shown.

The function f(x) = –(x – 3)2 + 9 can be used to represent the area of a rectangle with a perimeter of 12 units, as a function of the length of the rectangle, x. What is the maximum area of the rectangle?

Which quadratic function is the standard form of the equation shown?f(x) = x + 8 + 2x + 5x2