Question

Write the equation in the form y = mx + b for the

line that passes through the points (4, 11) and (2, 7).

Answer 1

subs by (4,11) in the equation
11 = 4m + b
subs by (2, 7 ) in the equation
7 = 2m +b
by solving the two equations
4m + b = 11
-2m -b = -7
-----------------------
2m = 4
m = 2
4(2) + b = 11
b = 11 - 8
b = 3
so the final form is y = 2x +3