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Fantom [35]
2 years ago
11

‍♀️always have problems with these

Mathematics
2 answers:
inysia [295]2 years ago
5 0
I hope that my hand writing is clear.

Lana71 [14]2 years ago
4 0

y=mx+b\\\\m=\dfrac{y_2-y_1}{x_2-x_1}

We have:

(1,\ 5)\to x_1=1,\ y_1=5\\(2,\ 2)\to x_2=2,\ y_2=2

Susbstitute:

m=\dfrac{2-5}{2-1}=\dfrac{-3}{1}=-3

y=-3x+b

Susbtitute the coordinates of the point (2, 2) to the equation:

2=(-3)(2)+b\\\\2=-6+b\ \ \ \ |+6\\\\b=8

<h2>Answer: y = -3x + 8</h2>
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Answer: The break even point is when they have sold 16 books and have made $288

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y = 18(16)

y = 288

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