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it is the equation of a straight line
for example, if I replace m=0, what is h?
that's right! So such line passes at point \((0,100)\)
now, if I replace \(h=0\), what is \(m\)?
hint: we have to solve this equation: \(0=20m+100\) \(m=...?\)
If I subtract 100, from both sides, I get: \(0-100=20m+100-100\) please simplify
Thats what i did i thought, 0-100=-100/200=-2. I forget the neg. sign on 100
I get this: \(-100=20m\) am I right?
-5 gosh I was thinking 20 was 200 sorry
ok! :) so our line also passes at point \((-5,0)\)
therefore, here is the corresponding graph: |dw:1450024752650:dw| please add the coordinates to my graph
i just saw your graph
our line passes at point \((0,100)\) and not at point \((0,5)\)
oh yea. I remember
now, we have to interpret the meaning of the x-intercept
intercept is the same thing as the x value ?
yes! It is \(m=-5\)
substantially, such value represents the height of the kite, with respect to a reference height, \(5\) minutes before starting of the competition
y=minutes after a kite-flying competition begins.
no, please the vertical coordinate \(y\) gives the height of the kite, whereas the corrdinate \(x\), gives the minutes
so, at the time wherein the competition starts, which is \(m=0\), what is the height of the kite?
please keep in mind that at \(m=0\) we have \(h=100\) feet (it is the point \((0,100)\))
so, if \(m=0\) then \(h=...?\)
that's right! At the time wherein the competition starts, the height of the kite is \(h=100\) feet. That is the meaning of the \(y-\) intercept
The height of the kite
yes! at \(m=0\) the height of the kite is \(h=100\) feet
Thank you so much