Is this a function? (1,1) , (2,2) , (3,5) , (4,10) , (5, 15)
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Hope this helps! I'm sorry for worse handwriting.
We know that 5 lbs of apples cost $2.99
To know how much do 3 lbs of apple cost, you can use cross multiplication
If 5 lbs cost $2.99
Then 3 lbs cost $x
The proportion between the price and the number of apples is the same, you have to calculate it as:
3 lbs of apples cost $1.79