Homework Help: Math

Posted by Emma on Monday, November 12, 2012 at 9:13pm.

Please help me understand this question, thanks!

10. Write the slope-intercept form of an equation of the line perpendicular to the line in Exercise 7 with a y-intercept of -3.

7. (4, -9), (-3, 2)

Math - Reiny, Tuesday, November 13, 2012 at 12:03am
slope for the the 2 given points
=(2+9)/(-3-4) = 11/-7

so the slope of a perpendicular line is +7/11

so for a slope of 7/11 and a y-intercept of -3 the equation is

y = (7/11)x - 3

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