Answer:
C
Step-by-step explanation:
Assuming the triangles are similar then the ratios of corresponding sides are equal, that is
=
( cross- multiply )
2.4x = 13.44 ( divide both sides by 2.4 )
x = 5.6 → C
(Y2-y1)/(x2-x1) = gradient
Pick two points: (2,6), (4,8)
(8-6)/(4-2) = 2/2 = 1
The gradient is 1
Store 1: 12 towel rolls for $3.30
Store 2: 15 towel rolls for $3.50
Divide 3.30 by 12 ⇒ 3.3/12 = $0.275 per roll - Store 1
Divide 3.50 by 15 ⇒ 3.5/15 = $0.233 per roll - Store 2
Store 2 has the lower unit price per roll, so
has the better deal.
224.1 is the correct model