Question

Write the slope-intercept equation of line that passes through (4,-5) and (5, -7).

1. Find the slope: m=
2. Find the y-intercept: b=
3. Equation of the line:

Answer 1

y = mx + b

m = (-7 - -5) / (5 - 4) = -2

y = -2x + b

Use either point to find b

Using (4, -5):

-5 = (-2)(4) + b

-5 = -8 + b

b = 3

y = -2x + 3

Explanation: