Two Points form Calculator  

Apply Formula:
(yy1/y2y1 = xx1/x2x1)
(y4/54 = x3/23)
(y4/9 =x3/1)
1(y4) = 9(x3)
1(y4) = 9(x3)
y4 = 9x – 27
y9x = 27 + 4
y9x = 23
9xy=23