Kelsey's bank charged her $17.50 for using her debit card at ATMs that are not owned by her bank 7 times
in the last month.
A) Kelsey's bank loses $2.50 each time Kelsey uses
her debit card at an ATM that is not owned by her
bank.
B) Kelsey is charged $2.50 each time she uses her
debit card at an ATM that is not owned by her
bank.
C) Kelsey earns $2.50 cach time she uses her debit
card at an ATM that is not owned by her bank.
D) Kelsey is charged S17.50 each time she uses her
debit card at an ATM that is not owned by her
bank.

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.

lol.

it's ok we all do this sometimes.

-aparri