Regents Exam Questions CC.S.ID.6: Regression 3
Page 1
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Name: __________________________________
CC.S.ID.6: Represent data on two quantitative variables on a scatter plot, and
describe how the variables are related. a. Fit a function to the data; use functions
fitted to data to solve problems in the context of the data. Use given functions or
choose a function suggested by the context. Emphasize linear and exponential
models.
1 Write an exponential equation for the graph
shown below.
2 An application developer released a new app to
be downloaded. The table below gives the
number of downloads for the first four weeks
after the launch of the app.
Write an exponential equation that models
these data. Use this model to predict how
many downloads the developer would expect in
the 26th week if this trend continues. Round
your answer to the nearest download. Would it
be reasonable to use this model to predict the
number of downloads past one year? Explain
your reasoning.
Explain how you determined the equation.
Regents Exam Questions CC.S.ID.6: Regression 3
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1 ANS:
. I inputted the four integral values from the graph into my graphing calculator and
determined the exponential regression equation.
REF: 011532ai
2 ANS:
. No, because the prediction at
REF: 061536ai
is already too large.