Question

Write the equation of the line that passes through (3,3) and (1,-5).

Answer 1

y=4x-9

Explanation:

Slope:

y2-y1=m(x2-x1)

subsitute the values

-5-3=m(1-3)

solve

-8=m-2

divide both sides by coefficient of x

/-2 /-2

4=m

y-intercept:

y=4x+b

subsitute

3=4(3)+b

solve

3=12+b

subtract 12 from both sides

-12-12

solve

-9=b