Answer:
y = 2x - 3
Explanation:
By using two points A and B, we find the equation of line.
By using formula,
y - y1 = {(y2 - y1) / ( x2 - x1 ) } ( x - x1 )
here points are, y1 = 1 , y2 = 5, x2 = 4, x1 = 2
y - 1 = {(5 - 1) / (4 - 2)} ( x - 2 )
y - 1 = 2x - 4
y = 2x -3