Concept explainers
An interesting correspondence. Suppose you invest some amount of money (we will call that unknown amount of dollars d) into a savings account that pays 1.25% simple interest annually. We let I represent the amount of interest you will have after one year. Thus there is a one-to-one correspondence between the amount you invest d and the amount of interest 1 you will earn after one year. That correspondence is given by the function
Use this function to find the value of I corresponding to
Express in words what your answer represents.
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