Answer:
y = 2x - 6
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 = 2, thus
y = 2x + c ← is the partial equation
To find c substitute (4, 2) into the partial equation
2 = 8 + c ⇒ c = 2 - 8 = - 6
y = 2x - 6 ← equation of line