Posted by **Chelsea** on Monday, June 6, 2011 at 8:05am.

Find the rate of change for the numbers shown below. Express number as a fraction.

(-3,7)

(0,5)

(3,3)

(6,1)

- Math rate of change -
**Damon**, Monday, June 6, 2011 at 8:31am
(5-7)/(0-(-3)) = -2/3

(3-5)/(3-0) = -2/3 remarkable

(1-3)/(6-3) = -2/3

just for sport

(1-7)/(6-(-3)) = -6/9 = -2/3 how do you like that? It might be a straight line through those points with slope = -2/3

Try one of those points in

y = -(2/3)x + b

7 = (-2/3)(-3) + b

7 = 2+b

b = 5

so

y = -(2/3) x + 5 goes through all points I believe

Try it in the last point

1 = -(2/3)(6) + 5 ?

1 = -4 + 5

1 = 1 , sure enough, done

- Get it ? -
**Damon**, Monday, June 6, 2011 at 8:32am
If you followed that, you can do them all without my help.

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