Question

Which is an appropriate domain for the function A?
a. The set of all real numbers
b. The set of all positive real numbers
c. The set of all Integers
d. The set of all positive integers

Explain how you know.

Which is the correct description of function A?
a. Linear and decreasing
b. Linear and increasing
c. Nonlinear and decreasing
d. Nonlinear and increasing

Explain how you know.

Answer 1

B, because the height of the boys can be anywhere between any positive number, however not negative because you can't be a negative height.

D, its is non-linear because their heights won't be going up by the same amount each time your x-value increases because the human body grows at different rates, it will be increasing because the human body is always growing until death.