The slope-intercept form of a line is $\displaystyle{y}={m}{x}+{b}\usepackage{cmbright}\Huge\$ , where m is equal to the slope of the line and b is equal to the y-intercept. You correctly found the y-intercept of the line using the point (0, 2). However, you calculated the run over the rise, instead of the rise over the run, when finding the slope, m.