Unit 6, Lesson 7
Linear Functions and Models
Accelerated 7
7.1
Warm-up
Noah is depositing money in his account every week to save money. The graph shows the amount he has saved as a function of time since he opened his account.
Elena opened an account the same day as Noah. The amount of money in her account is given by the function , where is the number of weeks since the account was opened.
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Who started out with more money in their account? Explain how you know.
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Who is saving money at a faster rate? Explain how you know.
Scatterplot of Noah's account, horizontal, weeks since opening account, 0 to 12 by 2, vertical, amount in the account, 0 to 140 by 20. Points at 0 comma 60, 2 comma 70, 4 comma 80, 6 comma 90, 8 comma 100, 10 comma 110, 12 comma 120, and 14 comma 130.