Find the equation of the line in slope-intercept form.

m=-1 and (9,4)

y = - x + 13

Step-by-step explanation:

The equation of a line in slope - intercept form is

y = mx + c (m is the slope and c the y - intercept)

Here m = - 1, thus

y = - x + c ← is the partial equation

To find c substitute (9, 4) into the partial equation

4 = - 9 + c ⇒ c = 4 + 9 = 13

y = - x + 13 ← equation in slope - intercept form