You may have thought that, since the slope is $\displaystyle\frac{{{r}{i}{s}{e}}}{{{r}{u}{n}}}\usepackage{cmbright}\Huge\$ , you needed to divide some numbers from the equation. The slope for a line written in the form $\displaystyle{y}={m}{x}+{b}\usepackage{cmbright}\Huge\$ is m. The correct answer is 6.