You can use the formula
So if you sub in the point and use you get:
the question says==> find an equation of the line through (-1,3) which is perpendicular to 4x+3y=12
and i got this===> y=-4/3x+b ==> i flip the -4/3 to 3/4
then putting it all together i got ==> 3= 3/4 (-1) + b
but thats as far as i can go.. i don't reall know what else to do (im not good with fractions)
how would i multiply the fraction and add it with whole number?