Mathematics, 08.11.2019 21:31, emmalouh5986
•using the information in the table above, write the linear equation that represents the cost, (y) of buying different amounts of books, (x).
• how much would it cost for 30 books?
• how many books would you get for $160?
Answers: 2
) over the change in x, looking like 
. You can switch the 2 and the 1 in the y values as long as you switch it in the x ones as well, or make the equation 
. Next, we want to plug in some coordinates - we have 5 as the x value and 28 as the y value, or (5,28) as one point. Next, we have (10,48) as another. Using the formula and plugging numbers in, we get 
as our slope. In the formula y=mx+b, that means that m=4 and our equation is y=4x+b. To find b, we have to plug in a point, such as (5,28). Using that, we get 28=5*4+b. Subtracting 5*4=20 from both sides of the equation, we get b=8 and our equation to be y=4x+8. 
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•using the information in the table above, write the linear equation that represents the cost, (y) o...
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