After very long time Toby's balance will be greater option (A) is correct and the equation for Toby's balance is y = 3(2)×⁻¹.
What is a function?
It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
We have:
Violet and Toby deposit money into their savings accounts at the end of each month.
From the Violet table, we can derive a general function that represents the total account balance
For Violet:
y = 30 + 20(x - 1)
y = 20x + 10
For Toby:
y = 3(2)×⁻¹
After plotting the above function on a graph paper we will see the graph of a function y = 3(2)×⁻¹ is above the graph of a function y = 20x + 10.
Thus, after very long time Toby's balance will be greater option (A) is correct and the equation for Toby's balance is y = 3(2)×⁻¹.
Learn more about the function here:
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