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?

Answer 1

You want to know the actual grade, you are given the equation for (expected) performance


First, substitute the 2.5 hours into time

\(P = 70.443+4.885\times\color{green}{2.6}\)

From then, you subtract what you got from above and 16 (because Ann got 16 points lower)

\(P-16=?\)