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Writing and evaluating a function that models a real-world situation: Advanced

Writing and evaluating a function that models a real-world situation: Advanced-example-1

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The situation can be represented as a linear function since the function has a constant rate of increase.


y=mx+b

In this case, y represents the amount of money there is in the account S, x represents the time in weeks that Tom has been adding money, in this case, W.


S=mW+b

b is going to represent the initial amount when the account started, and m the amount of money he puts in the account each week


S=70W+350

Then, using the equation replace W for 14.


\begin{gathered} S=70\cdot14+350 \\ S=980+350 \\ S=1330 \end{gathered}

The total amount after 14 weeks in the savings account is $1,330.

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