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PLEASE HELP ME, I HAVE NO IDEA! Find an equation for the line below.

PLEASE HELP ME, I HAVE NO IDEA! Find an equation for the line below.-example-1
User Mikel
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1 Answer

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Answer:

y -2 = -2/3(x +4)

Explanation:

There are several different forms of the equation for a line. Each is useful in its own way. Here, the line crosses the y-axis at a point between integer values, so using that intercept point could be problematical. That suggests the "point-slope" form of the equation for a line would be a better choice.

That form is ...

y -k = m(x -h) . . . . . . . line with slope m through point (h, k)

__

The two marked points are (-4, 2) and (5, -4). All we need is the slope.

The slope is given by the formula ...

m = (y2 -y1)/(x2 -x1) . . . . . . . . where the given points are (x1, y1) and (x2, y2)

m = (-4 -2)/(5 -(-4)) = -6/9 = -2/3

Using the first point, the equation for the line can now be written as ...

y -2 = -2/3(x -(-4))

y -2 = -2/3(x +4)

User Tarta
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