[tex]\begin{gathered} \text{ Fot the slope we take two points!} \\ (0,9)\text{ and (1,12) } \\ \\ \text{and apply the equation of the slope } \\ m=\frac{y_2-y_1}{x_2-x_1} \\ \\ m=\frac{12-9}{1-0} \\ \\ m=\frac{3}{1} \\ m=3 \\ \\ \text{ the slope is 3} \end{gathered}[/tex][tex]\begin{gathered} \text{ The y-intercept is the value of y when x=0, thus the y-intercept is 9} \\ \\ \\ \text{and the equation is} \\ y=3x+9 \end{gathered}[/tex]
