But first………...  A rate is a comparison between two quantities of different kinds.  Km per hour  Rpm = revolutions per minute  Liters per gallon.

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Presentation transcript:

But first………..

 A rate is a comparison between two quantities of different kinds.  Km per hour  Rpm = revolutions per minute  Liters per gallon  Often represented as a fraction

 Sound familiar?!?!??  Slope!

 Find speed of hair from A to B, B to C and C to D.  Find speed of tortoise (average speed)

 New tires have a tread depth of 8mm. After driving for km the tread depth was reduced to 2.3mm. What was the wearing rate of the tires in  a. Mm per km traveled?  b. cm per km traveled?