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Use the formula for slope to verify that a horizontal line has a slope of zero and that a vertical has an undefined slope.
I have no idea what to do can some one help explain it to me thanks. :)
 one year ago
 one year ago
Use the formula for slope to verify that a horizontal line has a slope of zero and that a vertical has an undefined slope. I have no idea what to do can some one help explain it to me thanks. :)
 one year ago
 one year ago

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hartnnBest ResponseYou've already chosen the best response.2
The slope of the line through points (x1,y1) and (x2,y2) is given by : \(\huge m=\frac{y_1y_2}{x_1x_2}\) now horizontal line has equation of the form y=c, here xterm has '0' coefficient take any two points on this, say (x1,c),(x2,c) so put y1 = c and y2 = c in m and tell me what u get.
 one year ago

Sup_open~studyBest ResponseYou've already chosen the best response.0
i'm sorry i don't get what the y = c part ??
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
i'll draw a horizontal linedw:1348817053391:dw can u see that yco ordinate of every point on that line is same??
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
that means for any value of xcoordinate , y coordinate will be some constant 'c' only.....so we can write its equation as y=c got this?
 one year ago

Sup_open~studyBest ResponseYou've already chosen the best response.0
i think so the y will stay the same ( constant) meaning y = c ??
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
yup. similarly for vertical line , the equation is x=c
 one year ago

Sup_open~studyBest ResponseYou've already chosen the best response.0
i don't get the x=c part ??
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
dw:1348817443207:dw can u see that xco ordinate of every point on that vertical line is same
 one year ago

Sup_open~studyBest ResponseYou've already chosen the best response.0
one is smaller than the other ??
 one year ago

Sup_open~studyBest ResponseYou've already chosen the best response.0
so they are not really the same ??
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
for a vertical line, x coordinate always remains constant. hence its equation can be written as x=c did u understand this?
 one year ago

Sup_open~studyBest ResponseYou've already chosen the best response.0
yes i think i kind of get what what you are saying
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
now reply to my first comment
 one year ago
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