Answer:
The equation is y = -4x + 21
Step-by-step explanation:
First we have to find the slope of the line. In this case it is already solved for y, so we just look for the coefficient of x (-4)
With the slope of -4, we now can plug the slope and point into point-slope form and get the final equation.
y - y1 = m(x - x1)
y - 1 = -4(x - 5)
y - 1 = -4x + 20
y = -4x + 21