I feel like I should know this by now (Worried)

Can someone please help with this PreCal question?

Find the equation of the line that satisfies the given conditions:

$\displaystyle x-intercept = 1$

$\displaystyle y-intercept = -3$

I'm pretty sure that the equation $\displaystyle y-y_{1}=m(x-x_{2})$ is used but I cannot find out how to obtain the slope $\displaystyle (m)$. Thanks in advance for the help.

-Jerry