Which of the following are true of linear functions? Select all that apply. There is exactly one output for each input. The graph of a linear function is a straight line. A linear function can cross the y-axis in two places. A linear function has a constant rate of change. A linear function must cross the x-axis.

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?