So to graph it you’d ideally want it in slope intercept form so
Y-4=13(x-3)
Y=13(x-3)+4
Y=13x-39+4
Y=13x-35
-So from there either plug it into a calculator and use the y= button
-or graph it from just the equation itself : starting on the y axis go down to -35 and that’s your first point
and use your slope (13/1) (remember it’s rise over run) and go up 13 boxes and over 1
Hope that helps