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The graph shows the cost of sending parcels of different masses. Tracey wants to send two parcels to a friend. One parcel weighs 400g, the other weighs 1.8 kg. How much cheaper is it to send them as one parcel rather than 2 separate parcels?400g cost $1.20
1.8kg costs $2.40Find the cost of each parcel sending them separately total cost = $2.40 + $1.20
= $3.60find the total of the two separate costs T = 0.4kg + 1.8kg
= 2.2kgfind the total weight of the two of them together Cost of 2.2kg = $2.80 find the cost of a 2.2kg package $3.60 – $2.80 = $0.80 Find the difference in price ∴ Cheaper by 80 cents
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