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vovikov84 [41]
4 years ago
15

What is the equation of the line, in slope-intercept form, that contains the points (−1, 4) and (2, −5)?

Mathematics
1 answer:
Dafna11 [192]4 years ago
7 0
The\ slope-point\ form:y-y_1=m(x-x_1)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}\\\\The\ slope-intercept\ form:y=mx+b\\--------------------\\(-1;\ 4)\to x_1=-1\ and\ y_1=4\\(2;-5)\to x_2=2\ and\ y_2=-5\\\\m=\dfrac{-5-4}{2-(-1)}=\dfrac{-9}{3}=-3\\\\y-4=-3(x-(-1))\\y-4=-3x-3\\\\\boxed{y=-3x+1}
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Answer:

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5 0
3 years ago
How do I find the slope of a perpendicular line?
Licemer1 [7]
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The Slope of a parallel line is obviously going to have the same slope as the line it is parallel to, which you already know.

But for perpendicular, how would we figure that out?

First, you need to understand whats going on.  Picture a linear line.  Now, look at the (0,0) point.  To make it perpendicular, it must form 90 degrees with the other line.  Now, to get the answer for a perpendicular line, you need to remember two steps.

1.) Change the sign to the opposite sign (negative would go positive and positive would go negative)

2.) You take the reciprocal of the line (That is what times that number would make that number equal one.  2 * 1/2 would be 1.  You can also look at this by switching the denominator and numerator.

If you have more questions, feel friend to add me and write me<span />
4 0
4 years ago
Find the value of y<br> (3y +31)+136
lakkis [162]

Answer:

y = about -55.67

Step-by-step explanation:

(3y+31)+136

3y+167

3y = -167

y = about -55.67

3 0
3 years ago
How do you do this....
Angelina_Jolie [31]

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3 years ago
3(9z+4) &gt; 35z - 4<br> What is z
attashe74 [19]

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2 > z

4 0
3 years ago
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