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lubasha [3.4K]
2 years ago
6

PLEASE HELP ITS MATH

Mathematics
1 answer:
xxMikexx [17]2 years ago
3 0

Answer:

y=[-4]x+[10]

Step-by-step explanation:

For a line to be perpendicular to another it must have the reverse reciprocal of the opposite line, to find the reverse reciprocal you take your slope, flip the numerator and denominator, and multiply it by -1.

The slope \frac{1}{4} turns into \frac{4}{1} and is then multiplied by -1 to become \frac{-4}{1} which can be simplified down to: -4

Now that we know the slope we need the line to pass through a point, so we will use point slope form:

y-y1=m(x-x1)
Substitute in our slope and point values:

y-2=-4(x-2)

Now solve for y:

y-2=-4(x-2)\\y-2=-4x+8\\y=-4x+10

Then you will find that line y=-4x+10 runs perpendicular to y=\frac{1}{4}x-8 and intersects point (2,2).

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The Regression Equation Suppose in this semester, our Exam 1 average was about 85 with an SD of about 12. Suppose the correlatio
kirill [66]

Answer:

0.410

Step-by-step explanation:

We are predicting exam 2 scores from exam 1 scores so the dependent variable y is exam 2 scores and independent variable is exam 1 scores x.

The regression equation is

y=a+bx

Where y is exam 2 scores and x is exam 1 scores.

We are given that

correlation coefficient=r=0.6.

Mean and standard deviation of x are xbarx=85 and Sx=12.

Mean and standard deviation of y are xbary=82 and Sy=8.2.

The slope b for this scenario can be found as

slope=b=r\frac{Sy}{Sx}

slope=b=0.6(\frac{8.2}{12} )

slope=b=0.6(0.6833)

slope=b=0.41

Thus, the slope of the regression equation for predicting  Exam 2 scores from Exam 1 scores is 0.410.

5 0
3 years ago
Please help I will mark brainlist if correct
Furkat [3]
Hi there!

Since the slope of a line perpendicular to a line is always the negative inverse of that slope, you just switch the numerator and denominator around and add or omit the negative sign to the original slope.

The answer would be -2.

Hope this helps!
5 0
3 years ago
Need help with problem
Fittoniya [83]

Answer:

<h2>17</h2>

Step-by-step explanation:

<h2><em><u>SINCE</u></em><em><u> </u></em><em><u>THE</u></em><em><u> </u></em><em><u>LINES</u></em><em><u> </u></em><em><u>ARE</u></em><em><u> </u></em><em><u>PARALLEL</u></em><em><u> </u></em><em><u>THEN</u></em><em><u> </u></em><em><u>ANGLE</u></em><em><u> </u></em><em><u>A</u></em><em><u> </u></em><em><u>AND</u></em><em><u> </u></em><em><u>ANGLE</u></em><em><u> </u></em><em><u>B</u></em><em><u> </u></em><em><u>ARE</u></em><em><u> </u></em><em><u>COREESPONDING</u></em><em><u> </u></em><em><u>TO</u></em><em><u> </u></em><em><u>EACH</u></em><em><u> </u></em><em><u>OTHER</u></em><em><u>.</u></em></h2><h3><em>A</em><em> </em><em>=</em><em> </em><em>7</em><em>x</em><em> </em><em>+</em><em> </em><em>2</em><em>4</em><em> </em></h3><h3><em>B</em><em>=</em><em> </em><em>3</em><em>x</em><em>+</em><em> </em><em>9</em><em>2</em></h3><h3><em>A</em><em>=</em><em>B</em></h3><h3><em>7</em><em>x</em><em> </em><em>+</em><em> </em><em>2</em><em>4</em><em> </em><em>=</em><em> </em><em>3</em><em>x</em><em> </em><em>+</em><em> </em><em>9</em><em>2</em><em> </em></h3>

<em>7</em><em>x</em><em> </em><em>-</em><em> </em><em>3</em><em>x</em><em> </em><em>=</em><em> </em><em>9</em><em>2</em><em> </em><em>-</em><em> </em><em>2</em><em>4</em>

<em>4</em><em>x</em><em> </em><em>=</em><em> </em><em>6</em><em>8</em>

<em>x</em><em> </em><em>=</em><em> </em><em>6</em><em>8</em><em> </em><em>/</em><em> </em><em>4</em>

<em>x</em><em> </em><em>=</em><em>1</em><em>7</em>

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