Joseph notices that everyone in his class reads at very different speeds. He wonders if a person's reading speed is related to the number of books he or she reads.
Joseph asks a few students in his class how many books they read last month, x, and times how long it takes them to read the same paragraph (in seconds), y.
The least squares regression line of this data set is:
y= –6.522x + 129.348
How many seconds does this line predict it would take to read the paragraph for a student who read 2 books last month?
Round your answer to the nearest integer.
seconds
According to the regression line,
y = -6.522(2) + 129.348
y = -13.044 + 129.348
y = 116.304
Therefore, the line predicts it would take approximately 116 seconds to read the paragraph for a student who read 2 books last month.