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Anon25 [30]
3 years ago
10

What is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point

(2, −1)? y = x − y = x − y = 3x − 3 y = 3x − 7
Mathematics
2 answers:
myrzilka [38]3 years ago
7 0

Given line: y =3x - 7

Slope-intercept form is y = mx + b where m is slope and b is the y intercept

To find m you must take the slope of the line given, which would be 3, and take its opposite reciprocal (switch its sign to negative/positive if it was originally positive/negative and flip the numerator and denominator)

the opposite of 3 is -3 and the reciprocal of -3 is \frac{-1}{3}

This means that the slope of a line perpendicular to y = 3x - 7 is \frac{-1}{3}

This is the current formula you found:

y=\frac{-1}{3} x + b

To find the y-intercept (b) in the point that this line goes through (2, -1) into the x and y of the equation and solve for b

-1 = \frac{-1}{3}(2) + b

-1 = \frac{-2}{3} + b

\frac{-1}{3} = b

That means that the equation perpendicular to y = 3x - 7 is...

y = \frac{-1}{3} x - \frac{1}{3}

Hope this helped!

~Just a girl in love with Shawn Mendes

Anit [1.1K]3 years ago
5 0

Answer:

y =3x - 7

Step-by-step explanation:

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