find the slope of M(-9,16) N(-11,16)
and the perpendicular slope thanks :)

Question

find the slope of M(-9,16) N(-11,16)
and the perpendicular slope thanks :)

cwrw238 · Answer

slope of line joining M and N  = 16-16/-11--9 = 0
- the line is parallel tp x-axis
line perpendicular is parallel to y-axis

anonymous · Answer

@cwrw238 how did u get 0? when the denominator is still a whole number?

cwrw238 · Answer

the numerator is 16-16 = 0
0 / -2 = 0
0 divided by any number which is not zero = 0

anonymous · Answer

o i get it now but to find the reciprocal inverse your have to flip it and then multiply by -1 how do you do the next step?

anonymous · Answer

@thechocoluver445 could u please help me?

anonymous · Answer

$$Recall\: that\: slope\: is\: \frac{y_2-y_1}{x_2-x_1}$$$$\And\: perpendicular\:  slope\:  is\: the\: opposite\: recpirocal: For\: example:\: If\: the\: slope\: is\: -\frac{2}{3}, then\: the\: opposite\: recpirocal\: is \frac{3}{2}$$

anonymous · Answer

yea but the slope is 0 and how can i reciprocal 0?

anonymous · Answer

If the slope is 0, that means it has to be a horizontal line: |dw:1341254912828:dw| Horizontal lines are perp. to vertical lines, so that means the slope is undefined (vertical lines have undefined slope)

anonymous · Answer

@thechocoluver445 okay so the perpendicular slope is undefined as well?

anonymous · Answer

The slope of the line is zero
The perpendicular slope is undefined
Yeah.

anonymous · Answer

thankyou so much :)

anonymous · Answer

yw :)