## Algebra 1

Positive; $m=12$
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: $m=12$