Posted by **Miley** on Friday, December 27, 2013 at 9:30am.

A line has x-intercept (5, 0) and is perpendicular to the line 2x + 8y = 10. Find the y-intercept of the line.

- Math -
**Reiny**, Friday, December 27, 2013 at 10:27am
your given line of 2x + 8y = 10 has slope -2/8 or -1/4

so the slope of a perpendicular line is +4

its equation is y = 4x + b, but (5,0) lies on it, so

0 = 4(5) + b

b = -20

new equation: y = 4x - 20

and the y-intercept is -20, (since we have it in slope y-intercept form)

## Answer This Question

## Related Questions

- math - How do I write one equations in slope-intercept form, and three other ...
- Math(word problem) - For the line joining points A(-1, 3) and B(5, 7): a.Find ...
- math - 1. The x-intercept of a line is -3. The y-intercept of a line is 6. What ...
- Math/Algebra do u know how to do slope intercept? - The following problems are ...
- Math(Please help) - Write an equation of the line satisfying the given condition...
- Math - Write an equation of the line satisfying the given condition. a) x ...
- Math - A line has y-intercept (0, 3) and is perpendicular to the line 2x + y = 3...
- math/algebra1a - write the equation of the line which has y-intercept (0,5) and ...
- Math - Please help me understand this question, thanks! 10. Write the slope-...
- Math - lines a and b are perpendicular and have the same x-intercept. The ...

More Related Questions