If two lines in the standard (x,y) coordinate plane are perpendicular, and the slope of one of the lines is -5/7, what is the

slope of the other line ?

A.) 7/5

B.) 5/7

C.) -5/7

D.) -7/5

E.) -5

slope of the other line ?

A.) 7/5

B.) 5/7

C.) -5/7

D.) -7/5

E.) -5

**Perpendicular lines have slopes which are negative reciprocals of each other. For example: 3/4 and -4/3.**

**Parallel lines have equal slopes.**

If the slope of one of the perpendicular lines is -5/7,

the slope of the other line would be 7/5. {the negative reciprocal of -5/7}

**A.) 7/5**

**Ask Algebra House**