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The equation y=−3.5x2−0.5x+65 models the height of a ball in inches for each bounce.

What is the best approximate for the height of the ball after the 3rd bounce?

 

7 in.

14 in.

32 in.

50 in.

 

The equation p = 1.65t² + 18.25t + 155 approximates the average sale price p of a house (in thousands of dollars) for years t since 2010.

What is the best estimate for the price of the house in year 2018?

 

$364,000

$407,000

$427,000

$453,000

jbouyer  Jan 20, 2018
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 #1
avatar+85633 
+1

−3.5(3)^2 − 0.5(3) + 65  =  32 in

 

 

For the second one, we need to replace t  with 8   [ 2018 is 8 years after 2010 ]

 

1.65(8)^2 + 18.25(8) + 155  = 406.6   =  $407,000

 

 

cool cool cool

CPhill  Jan 20, 2018

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