Martin has a gift card to a coffee shop. Each day he buys the same coffee. This table shows the amount remaining in dollars on the gift card on different days.

Days 2 4 5 7

Amount remaining $24.10 $18.20 $15.25 $9.35

Which equation represents the situation?

y+24.10=2.95 (x-2) y+24.10=2.95 (x-2)

y-18.20=-2.95 (x+4) y-18.20=-2.95 (x+4)

y-9.35=-2.95 (x-7) y-9.35=-2.95 (x-7)

y+15.25=-2.95 (x+5)

Question

Mathematics

Charlie Carney

15 January, 16:09

Martin has a gift card to a coffee shop. Each day he buys the same coffee. This table shows the amount remaining in dollars on the gift card on different days.

Days 2 4 5 7

Amount remaining $24.10 $18.20 $15.25 $9.35

Which equation represents the situation?

y+24.10=2.95 (x-2) y+24.10=2.95 (x-2)

y-18.20=-2.95 (x+4) y-18.20=-2.95 (x+4)

y-9.35=-2.95 (x-7) y-9.35=-2.95 (x-7)

y+15.25=-2.95 (x+5)

+5

Answers (1)

Know the Answer?

Warren Thornton · Answer 1

(2,24.10) (4,18.20)

slope (m) = (18.20 - 24.10) / (4 - 2) = - 5.9/2 = - 2.95

y - y1 = m (x - x1)

slope (m) = - 2.95

(7,9.35) ... x1 = 7 and y1 = 9.35

now we just sub

y - 9.35 = - 2.95 (x - 7) <===