Question 486658
Use formula 
{{{y-y[0]=m(x-x[0])}}}
substitute {{{x[0]=3}}}, {{{y[0]=-5}}}, {{{m=3/4}}}
{{{y-(-5)=(3/4)(x-3)}}} 
{{{y+5=(3/4)x-9/4}}}
{{{y=(3/4)x-29/4}}}