Brian has $88 in his savings account. If he saves S3.50 per week, how long will it take him to have $200 in his account?

1 Answer
Mar 11, 2018

32 \text{ Weeks}

Explanation:


Consider the basic linear function of form:

f(x)=mx+c

where, \ m\ represents the slope and \ c\ represents the y-intercept (where x=0).

Let's say, \ p\ representst the number of weeks from now, and \text{Brian} have \ $88\ in his account now.

For the saving account, the amount of money \ p\ weeks from now can be represented by the linear function:

f(p)\ =\ 3.5p+88

We are given with, \ f(p)=200. So put this value in the function and solve the resulting equation for p.

3.5p+88\ =\ 200

\Rightarrow\ \ p=32

That's it!