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PSYCHO15rus [73]
3 years ago
10

Write an equation of the line parallel to y=8x-1 that contains the point (-6,2)

Mathematics
2 answers:
s2008m [1.1K]3 years ago
5 0
Parallel lines have the same slope so you use the 8 from the equation and plug in with your points to point slope form equation 

Charra [1.4K]3 years ago
4 0

Answer:

y=8x+50

Step-by-step explanation:

We are looking for the same line but with a different y-intercept.

Equation of a line in its Slope–intercept form is given by:

y=mx+b

Where:

m=slope\\b=y-intercept

We know the slope which is the same of the line:

y=8x-1

So:

m=8

And we know a point:

(x_o,y_o)=(-6,2)

Let's find the equation of the line parallel to y=8x-1 using the data provided and the next equation:

y-y_o=m(x-x_o)\\\\y-2=8(x-(-6))\\\\y-2=8x+48\\\\y=8x+50

Now let's verify the result.

First, does it contains the point (-6,2)?

Evaluate the function for x=-6:

y=8(-6)+50\\\\y=-48+50\\\\y=2

Second, is it parallel to y=8x-1?

Try to solve the 2x2 system of equations:

8x-y=1\hspace{3}(1)\\8x-y=-50\hspace{3}(2)

Using elimination method:

(1) - (2)

8x-8x-y-(-y)=1-(-51)\\\\0=-51

The system has no solutions. Hence the lines are parallel.

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\textsf{Let's calculate the slope of the line passing thought the points (-4, 4) and (-6, 6) } \\ \textsf{using the following formula: }\mathsf{m = \frac{\Delta y}{\Delta x}} \textsf{ where m is the slope of the line.}\textsf{So:}

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