Find questionsToday, everything at a store is on sale. The store offers a 20% discount. a) The regular price of a T-shirt is $18. What is the discount price? $
3.6

b) If the regular price of an item is x dollars, what is the discount price in dollars? Write an expression. $
3.28

c) The discount price of a hat is $18. What is the regular price? $

Answer a is 14.40 the discount price is 14.40

step-by-step explanation:

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.