Question

PLEASE HELP!!!! The amount of money in alexander's account is y=4000-70x where y is the amount in dollars and x is the time in weeks.
a) determine the rate of change of money in alexander's account
b) find the x and y intercepts? interpret their meaning with respect to alexander's account

Answer 1

a. from the equation, rate of change is -70 dollars/week
b. x intercept, when y is zero, or x=4000/70
y intercept, when x is zero, 4000

Answer 2

y-intercept is the initial account balance (time=0)
x-intercept is how long it takes to empty the account (money=0)