I'm guessing that point-slope form is somewhat like slope intercept form=y=mx+b is what I learned m=slope b=y-intercept
so slope is 6 so subsitute y=6x+b now solve for b by subsituting (x,y) so (-8,-7) x=8 y=-7 subistute -7=6 times -8+b -7=-48+b add 48 to both sides 41=b