Answer
Negative; $m=-2$
Work Step by Step
The slope is negative, because the more questions the student answers incorrectly, the lower his score is.
To find the slope, we use the formula $m=\frac{y_2-y_1}{x_2-x_1}$.
We plug in the $x$ and $y$ values from the figures stated in the problem: $m=\frac{98-90}{1-5}$
We simplify above and below the fraction bar with subtraction: $m=\frac{8}{-4}$
We divide the fraction: $m=-2$
