Answer:
y =
x -

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 =
, hence
y =
x + c ← is the partial equation
to find c substitute (5, 1 ) into the partial equation
1 =
+ c ⇒ c = -

y =
x -
← in slope-intercept form