Answer:
y = - 
 x + 8
 x + 8
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 = - 
 , then
 , then
y = - 
 x + c ← is the partial equation
 x + c ← is the partial equation
to find c substitute (5, 5 ) into the partial equation
5 = - 3 + c ⇒ c = 5 + 3 = 8
y = - 
 x + 8 ← equation of line
 x + 8 ← equation of line