Question

Points (1,1) and (2,4) lie on line k. what is the slope of the line that is perpendicular to k?

Answer 1

the equation for slope is ( y_{1} [/tex] --
`y_(2)`) over (
`x_(1)` --
`x_(2)`)

so for these two points, your equation would be
`(1- 4)/(1- 2)`

which equals 3.

now any two lines that are perpendicular have the exact same slope by definition, so any line perpendicular to the line you just solved for will have a slope of positive 3.