By observing a set of data values, Tina used a calculator for the engine speed and predicted horsepower to get an equation for the least-squares line:

= 10 + 30x.

Based on the data that Tina collected, select the statement that is TRUE.

• a.)
• The horsepower associated with an engine speed of 3.5 rpm would be 110 hp.
• b.)
• The horsepower associated with an engine speed of 1.5 rpm would be 70 hp.
• c.)
• The horsepower associated with an engine speed of 0.5 rpm would be 40 hp.
• d.)
• The horsepower associated with an engine speed of 2.5 rpm would be 85 hp.