Find the value of y for the given
value of x.
y = x - 15; x = 9

Which of the following best describes the graph below? a. it is a function, but it is not one-to-one. b. it is a one-to-one function. c. it is not a function. d. it is a many-to-one function.

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Which of the following is an equation of a line parallel to the equation y=4x+1?