Which statement describes the rate of change of the following function?
f(x) = 9x - 4
a.
the function has a constant rate of change, decreasing for all x at a rate of 4.
b.
the function has a constant rate of change, increasing for all x at a rate of 9.
c.
the function has a varying rate of change when x > 9.
d.
the function has a varying rate of change when x < 4.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price