Answer:
y = 3x - 9
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 = 3 , thus
y = 3x + c ← is the partial equation
To find c substitute (4, 3) into the partial equation
3 = 12 + c ⇒ c = 3 - 12 = - 9
y = 3x - 9 ← equation of line