Answer:
(c) Paul's model predicts a score of 51 for 3 hours
(d) 30 represents the y intercept
Explanation:
Given

Solving (c): What is y when x is 3
Substitute 3 for x in




Solving (d): What does 30 represent
An equation is represented as:

Where

Compare:
to


This implies that 30 represents the y intercept