Question

what is an equation of a line passing through (3,3) and (4,7) ?

Answer 1

First of all for solving this question do you know the conception of : Basic Straight Lines

Answer 2

m=4

Answer 3

m = (y2 - y1)/(x2-x1)......set 1(3,3)...set 2(4,7)
m = (7 - 3)/(4 - 3)
m = 4/1 = 4

y = mx + b.....(3,3)
3 = 4(3) + b
3 = 12 +b
3 - 12 = b
-9 = b

y = 4x - 9 <-- answer