Question 180809
Concepts you should know:
1) Parallel lines have equal slopes
2) Equation in slope-intercept form: y=mx+b; where m=slope and b=y-intercept
3) Given a point and slope, you will need to use point-slope form to start....
4) Point-Slope Form:  y-y1= m (x - x1)

Answer:

(x1, y1) = (5, -3)
m= -3

y-y1= m(x-x1)
y--3 = -3(x-5)
y+3 = -3(x-5)
y+3 = -3(x)-3(-5)
y+3 = -3x + 15
y+3-3 = -3x + 15 -3
y= -3x + 12