The graph below shows the price of different numbers of hats at a store:

1 answer:

3 0

Since p is the cost of h hats, the output is the p and the input is h.
p=?h

Now we find the slope by using m=(y2-y1)/(x2-x1) and points (2,13), (4,26)
m=(26-13)/(4-2)=13/2=6.5

OR using the proportionality constant since y is a direct variation to x
K=y/x=13/2=6.5

Solution: p=6.5h

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Step-by-step explanation:

Let number of paper back books be 'x'.

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$x+y=89 \ \ \ \ \ equation \ 1$

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$2x+5y=271 \ \ \ \ equation \ 2$