- anonymous

Compare and contrast these four functions using complete sentences. Focus on the slope and y-intercept first, and then on any additional properties of each function.

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what's the slope and y-int of the first function?

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(– 2, 2) and (– 1, – 1)

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ok, what's the slope?

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o i have no idea

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|dw:1434409578106:dw|

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plug in the points to find the slope

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-3/1

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|dw:1434409683611:dw|

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that's right, the slope is -3

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now what is the y-intercept

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i dont get it

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where does the line cross the vertical axis

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-4

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correct, that's the y-intercept

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so thats for the first funtion

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ya, what is the slope and y-int for the second function?

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would the slope be 3

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ya, and the y-int?

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-4

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crrect

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the third one is a little abstract

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we'll make the days of the week x and the number of apples y

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monday will be 0 and tuesday will be one

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points are (0,4) and (1,1)

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so that would be for my slope correct?

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and y-int

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so the slope is -3 and the y-int would be 4?

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that's right

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last one?

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would i need to the formula i just used for the last one

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first find the slope

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i got 12/4

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the y-intercept takes a little bit of algebra

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so it would be 3

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correct

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so the equation of the line is
y=3x+b
where b is the y-int

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plug in one of the points for x and y and solve for b

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lets use the point (2,10)

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im lost

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10=3(2)+b

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solve for b

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do i multiply 3 and 2 and get 6 then divide?

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no dividing

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3(2) is 6

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10=6+b

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what is the last step?

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subtract

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o its 4

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THANK YOU SOOOOOO MUCHHHH

- anonymous

no problem

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