A students saving account has balance of $4700 on September 1. Each month for 6 months, the

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A student’s saving account has balance of $4700 on September 1. Each month for 6 months, the balance declines by $650. Let B be the balance (in dollars) at t months since September 1.
a. Why is there a linear association between t and B?
b. Find the slope of a linear model. What does it mean in this situation?
c. Find an equation of the model.
d. Graph the model by hand.
e. When was the balance $1450? Explain by using arrows on the graph you sketched in part (d).
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