Laurie's parents gave her $25 to open a checking account. At the end of each week after the account was opened, Laurie deposited $20 into her checking account. No other money was
deposited into or withdrawn from the checking account
a. What was the total amount of money in Laurie's checking account at the end of week 5?
Show or explain how you got your answer.
b. On the grid in your Student Answer Booklet, plot six points with coordinates (x, y), in
which x and y are defined as follows:
• r = the number of weeks since the account was opened (in whole numbers
from 0 through 5), where x = 0) corresponds to the opening of the account
· y = the total amount of money in the account at the end of week x
Be sure to label the x-axis and y-axis, indicate the scale on each axis, and include a title
for your graph.
c. Write an equation that represents the line that passes through all the points plotted in
part (b). Show or explain how you determined your equation.
d. For the line represented by your equation in part (c), explain the meaning of the y-intercept
in the context of this problem.