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A store sells packages of comic books with a poster. A poster and 5 comics cost ​$15.75 A poster and 11 comics cost ​$27.75 Write a linear function rule that models the cost y of a package containing any number x of comic books.

Sagot :

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Answer:

y=x+5.99

Step-by-step explanation:

A poster and 2 comics cost ​$7.99

(2,7.99)

A poster and 11 comics cost ​$16.99.

(11,16.99)

Let y be the cost of package and x be the no. of comics

We will use two point slope form :

(x1,y1) = (2,7.99)

(x2,y2) = (11,16.99)

Formula :

y-y1 = y2-y1/x2-x1(x-x1)

Substitute the values:

Hence a linear function rule that models the cost y of a package containing any number x of comic books is y=x+5.99

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