1 Chapter #9 What’s My Curve?. In this chapter we will study both linear and curved models…....
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1 Chapter #9 Chapter #9 What’s My What’s My Curve? Curve?
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Transcript of 1 Chapter #9 What’s My Curve?. In this chapter we will study both linear and curved models…....
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Chapter #9Chapter #9
What’s My What’s My Curve?Curve?
In this chapter we will study both In this chapter we will study both linearlinear and curved models…. and curved models….
They could be:They could be:
EXPONENTIALEXPONENTIAL
OROR
POWER POWER
MODELS !!MODELS !!
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Since you all come from Since you all come from different classes last yeardifferent classes last year
(PRECALC, ALG 2 TRIG, (PRECALC, ALG 2 TRIG, ALG TRIG GENERAL) we ALG TRIG GENERAL) we need to check what you need to check what you
know/remember!know/remember!
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TimeTime
forfor
AA
PRE-TEST!!!!!!PRE-TEST!!!!!!( ( don’t freak out..it’s not being gradeddon’t freak out..it’s not being graded!)!)
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Time for a pretest!!!Time for a pretest!!!
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HOW DID YOU DO?????HOW DID YOU DO?????
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What makes something a What makes something a power equation verses an power equation verses an exponential equation???exponential equation???
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by a x xy a b
Exponential FunctionsExponential Functions
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xy a b
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In 1960 you could In 1960 you could purchase a brand new purchase a brand new
Cadillac forCadillac for__$$____________$$__________
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In 1960 you could In 1960 you could purchase a brand new purchase a brand new
Cadillac forCadillac for$5000.00!!!!!$5000.00!!!!!
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How fast How fast have prices have prices
risen???risen???
Let’s Let’s explore... explore...
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Enter this dataEnter this data
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Make a Make a Scatterplot!!!Scatterplot!!!
Does a LINEAR Does a LINEAR model seem model seem appropriate?appropriate?
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What type of function do What type of function do you think this is?you think this is?
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Was this your choice???Was this your choice???
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Write your model Write your model using words…...using words…...
•Price = 114.06(1.0535)Price = 114.06(1.0535)
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Price=114.06(1.0535)Price=114.06(1.0535)
Since the base is LARGER Since the base is LARGER
than one it is EXPONENTIAL than one it is EXPONENTIAL
GROWTH by ______%GROWTH by ______%
Let’s look at the residual plot!Let’s look at the residual plot!
2020
Price=114.06(1.0535)Price=114.06(1.0535)
Since the base is LARGER Since the base is LARGER
than one it is EXPONENTIAL than one it is EXPONENTIAL
GROWTH by ______%GROWTH by ______%
Let’s look at the residual plot!Let’s look at the residual plot!
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What do you think???What do you think???
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Use your model to predict Use your model to predict the price of a Cadillac in the price of a Cadillac in
2020!!2020!!
Price=114.06(1.0535)Price=114.06(1.0535)
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What do you think of our What do you think of our answer, $59,413.00???answer, $59,413.00???
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Turn to Page 1 in your Turn to Page 1 in your packetpacket
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Turn to Page 1 in your Turn to Page 1 in your packetpacket
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