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Marina86 [1]
2 years ago
9

Help with this please

Mathematics
1 answer:
likoan [24]2 years ago
3 0
The third one, the slope is -1 you recalculate it using the gradient rule= y^2-y^1/x^2-x^1 , choose any two points and one point is one and the other is 2 foe example :
x y
(0,3)1
(3,0)2
-3/3 = -1
and the line intercept the y axis at 3 so the y-intercept or the C =3
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Write the equation of a line through the points (−7,14) and (−21,28) in slope-intercept form
Harlamova29_29 [7]

Answer: y= -x + 7

Solution:

Step 1 : find the slope using the equation using the pair of coordinates that are given i.e A (−7,14)  B (−21,28) ( name them A and B respectively so they can be easily named as x1, y1 and x2,y2 respectively)

m = y2-y1/x2-x1

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Step 2 : Find the y intercept using the line of equation (use and one of the given coordinates either A or B)

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14= 7 + b

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y= -x + 7





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Step-by-step explanation:

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