Find the equation of a line that passes through the points (4, 3) and (8, 1).
1.Find Slope
m=
2. Pick a point
( , )
3. Plug in AND solve for b
y=mx+b
b=
4. Write the equation using m and b from step 1 and 2
1. Find Slope
m = (1-3)/(8-4) = -2/4 = -1/2
2. Pick a point
(4, 3)
3. Plug in AND solve for b
y = mx + b
3 = (-1/2)(4) + b
3 = -2 + b
b = 5
4. Write the equation using m and b from step 1 and 2
y = (-1/2)x + 5