Question

If the straight line that passes through (2,1) and (5, 7) is drawn accurately, it passes through the point (20, y). What number does y stand for?

Answer 1

Answer: y=39

Explanation:

Y(2)-Y(1)/X(2)-X(1)

7-1/5-2=6/3=2

Y-Y(1) = m (X - X(1))

Y-1 = 2 (X-1)

Y-1 = 2X -2

Y = 2X -1

Y= 2(20) -1

Y=39