4. The following table shows the cost of renting a full-size rental car, based on the
number of miles driven.
a. Explain why a linear equation is appropriate for
this relationship.
Distance driven Total cost
(in miles)
0
$68.97
50
$88.47
100 l $107.97
$127.47
200
$146.97
150
b. Find the slope of the line and explain what it means.
c. Find the y-intercept and explain what it means.
d. Write the equation of the line.
e. I'm trying to decide whether I can afford to rent a full-size car to drive to
St. Louis, which is about 180 miles away. How much would that cost for a
one-way trip? How much would it cost for a round trip of 360 miles?

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test