Read the following description of a data set.

Question

For a project in her statistics class, Bridget surveyed her classmates about the extent of their travel experience.
Bridget asked her classmates how many states, x, and how many countries, y, they had visited.
The least squares regression line of this data set is:
y= 0.098x + 7.036

How many visited countries does this line predict for a student who has visited 4 states?
Round your answer to the nearest integer.
____ countries

Answer 1

The equation of the least squares regression line is y = 0.098x + 7.036.

Plugging in x = 4:

y = 0.098(4) + 7.036
y = 0.392 + 7.036
y = 7.428

Rounding to the nearest integer, the line predicts that a student who has visited 4 states has visited 7 countries.