Question

what is the equation of a line that passes through
(7,8) and has a slope of -3 ?

Answer 1

http://www.enotes.com/homework-help/what-equation-line-passing-through-point-0-8-459325
Here is something close to your question

Answer 2

standard equation
y=mx+c
m=slope=-3
y=-3x+c
for finding value of c put value of x and y
8=-3*7+c
8=-21+c
c=29
so
y=-3x+29 is your equation

Answer 3

@itsgermanbruh