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Roofcake

Need a math whiz.

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Roofcake    1

So, I'm doing geometry and I felt pretty confident until today when our teacher handed us a worksheet that says 'Write an equation in slope intercept form of a line that passes through the given point and is parallel to the graph of each equation.'

So, for example:

2x + y = 5; (3,1)

I've got it down to:

y = 2x - 5; (3,1)

And now I'm stuck. This may seem elementary to some, but I'm not the greatest at math, so any help is appreciated!

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Rick    19

Google is your friend with math. I've always been able to find explanations when needed. Youtube can be another good recourse.

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Roofcake    1

2x + y = 5

Take the 2x over to the other side so it makes it y = -2x + 5

-2 is the gradient (parallel lines have same gradient)

y-y1=m(x=x1) y-1= -2(x-3) y=-2x + 7

How did you get 7?

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Andrew    0

2x + y = 5

Take the 2x over to the other side so it makes it y = -2x + 5

-2 is the gradient (parallel lines have same gradient)

y-y1=m(x=x1) y-1= -2(x-3) y=-2x + 7

How did you get 7?

y-1 = -2x + 6 then plus the one over. Just expanded the brackets (-2 x -3 = 6)


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