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Find an equation for the line perpendicular to 5x-8y=3 having the same y-intercept as 3x+5y=2

User Jesse Good
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1 Answer

3 votes

Answer:

y = -8/5x + 2/5

Explanation:

First let's find the y-intercept of 3x+5y=2 by solving for y (putting into slope-intercept form)

5y = -3x + 2

y= -3/5x + 2/5

The y-intercept is 2/5

A perpendicular line has the opposite reciprocal slope. We need to find the slope of 5x-8y=3 by solving for y as well.

-8y = -5x + 3

y = 5/8x - 3/8

The slope is 5/8

The opposite reciprocal would be -8/5

Putting the y-int and slope together in slope-intercept form for the new line... y = -8/5x + 2/5

User Elchin
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