Answer
Positive; $m=12$
Work Step by Step
The slope is positive, because the more uniforms ordered, the greater the cost.
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: $m=\frac{114-66}{9-5}$
We simplify above and below the fraction bar with subtraction: $m=\frac{48}{4}$
We divide the fraction: $m=12$
