Question 1055644
Don't panic.
First find the slope.
{{{m=(y[2]-y[1])/(x[2]-x[1])=(-8-(-3))/(4-7)}}}
Once you have that use the point slope form with either point,
{{{y-(-3)=m(x-7)}}}
{{{y+3=m(x-7)}}}
{{{y+3=mx-7m}}}
{{{-mx+y=-3-7m}}}
Get rid of any fractions and make sure the coefficient of x is positive (multiply both sides by -1 if necessary).