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mixer [17]
3 years ago
9

Brainliest to correct answer

Mathematics
2 answers:
qwelly [4]3 years ago
8 0

Answer:

  • y = 0.35x

Step-by-step explanation:

<u>Janet ⇒ 3 postcards ⇒ $1.05 </u>

  • Cost of postcard: 1.05/3 = $0.35

<u>Rosi ⇒ 5 postcards ⇒ $1.75 </u>

  • Cost of postcard: 1.75/5 = $0.35

<u>Tanya ⇒ 8 postcards ⇒ $2.80</u>

  • Cost of postcard: $2.80/8 = $0.35

<u>We see in all 3 cases cost of postcard is same, the cost and numbers are proportional and the relationship is:</u>

  • y = 0.35x

padilas [110]3 years ago
7 0

y = 0.35x

Step-by-step explanation:

Janet ⇒ 3 postcards ⇒ $1.05

Cost of postcard: 1.05/3 = $0.35

Rosi ⇒ 5 postcards ⇒ $1.75

Cost of postcard: 1.75/5 = $0.35

Tanya ⇒ 8 postcards ⇒ $2.80

Cost of postcard: $2.80/8 = $0.35

We see in all 3 cases cost of postcard is same, the cost and numbers are proportional and the relationship is:

y = 0.35x

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