A professor determined the relationship between the time spent studying (in hours) and performance on an exam.

Performance = 70.443 + 4.885 * (time)

Ann studied 2.6 hours for the last exam. However there was a concert in town the night before and her score was 16 points lower than expected. What was her score on this exam, rounded to the nearest integer?

Question

A professor determined the relationship between the time spent studying (in hours) and performance on an exam.

Performance = 70.443 + 4.885 * (time)

Ann studied 2.6 hours for the last exam. However there was a concert in town the night before and her score was 16 points lower than expected. What was her score on this exam, rounded to the nearest integer?

johnweldon1993 · Answer

So originally

$$\large perfomance = 70.443 + 4.885t$$

the 't' is the time spent studying...so since it states that she studied for 2.6 hours...we need only plug that in for 't' to solve for the performance

Then, since her score was 16 points less, we just subtract 16 from the result