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dusya [7]
3 years ago
8

PLZZZZZZZZZZZZ HELP THANKS :D

Mathematics
2 answers:
evablogger [386]3 years ago
7 0
<h3>Answer: choice D) y + 6 = \frac{5}{2}(x +2)\\\\</h3>

=======================================

Explanation:

Pick any two points from the table to find the slope. I'll use the first two rows.

Let (x_1,y_1) = (-4,-11) \text{ and } (x_2,y_2)  = (-2,-6)

So the slope is...

m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}\\\\m = \frac{-6 - (-11)}{-2 - (-4)}\\\\m = \frac{-6 + 11}{-2 + 4}\\\\m = \frac{5}{2}\\\\

This means the answer is between choices A and D.

If we plugged in the set of x,y values from row 2, into the point-slope formula, then we would have

y - y_1 = m(x - x_1)\\\\y - (-6) = \frac{5}{2}(x - (-2))\\\\y + 6 = \frac{5}{2}(x +2)\\\\

which leads to choice D as the answer.

svetoff [14.1K]3 years ago
3 0
Sdfff bhbhhb. Dddffff
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Find the slope of the line that is ​(a) parallel and ​(b) perpendicular to the line through the pair of points.
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Answer:

a) The slope of the line is parallel to the another line m=4

b) The slope of the line is perpendicular to the another line m=\frac{-1}{4}

Step-by-step explanation:

Step1:-

<u>Slope of a line</u><u> :-</u>

If θ is the inclination of a line 'l' then tanθ is called the slope or gradient of the line 'l'.The slope of a line is denoted by m=tanθ

The slope of a line given two points m=\frac{y_{2}-y_{1}  }{x_{2} -x_{1} }

<u>Parallel lines:-</u>

<u>Two </u>non-vertical lines are parallel if and only if their slopes are parallel

<u>Perpendicular lines:-</u>

<u>Two </u>non-vertical lines are perpendicular to each other if and only if their slopes are negative reciprocals of each other.

m_{2} = \frac{-1}{m_{1} } \\

<u>Step 2</u>:-

a)The slope of a line when given two points (-1,-4) and (0,0)

m = \frac{0-(-4)}{0-(-1)} =4

<u>Two </u>non-vertical lines are parallel if and only if their slopes are parallel

m_{1} = m_{2}

Therefore the slope of the line that is parallel to the another line

m_{1} =m_{2} =4

<u>Step 3</u>:-

b) <u>Two </u>non-vertical lines are perpendicular to each other if and only if their slopes are negative reciprocals of each other.

m_{2} = \frac{-1}{m_{1} } \\

m_{2} =\frac{-1}{4}

Therefore the slope of the line is perpendicular to the another line is

m=\frac{-1}{4}

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