look at x and y,
when x increases by 1, y increases by 3
so is there a correlation/relationship btw x and y?
OpenStudy (camerondoherty):
Yes right?
OpenStudy (nikato):
yea.
OpenStudy (camerondoherty):
So f(x) = x + 3?
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OpenStudy (nikato):
no. what is the slope?
OpenStudy (camerondoherty):
3?
OpenStudy (solomonzelman):
It can't be a line, since there is no common difference between the xs and the ys.
OpenStudy (nikato):
no pick any two points
lets say
0,4 and 1,7
use slope formula
\[\frac{ 7-4 }{ 1-0 }=?\]
OpenStudy (solomonzelman):
It is not a line
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OpenStudy (solomonzelman):
IT IS A LINE I am sorry.
OpenStudy (solomonzelman):
yes, I am stupid, sorry !
OpenStudy (solomonzelman):
just by graphing the points you can see the slope is 3.
OpenStudy (camerondoherty):
so i got tht right?
OpenStudy (nikato):
no. you're function is still not right
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OpenStudy (solomonzelman):
no, the y-intercept is 4
OpenStudy (nikato):
slope is 3 and y-intercept is 4
so
f(x)= 3x+4
OpenStudy (solomonzelman):
YEs
OpenStudy (camerondoherty):
ohhhh ok
OpenStudy (solomonzelman):
So you did B and A
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OpenStudy (solomonzelman):
Can you do C ?
OpenStudy (camerondoherty):
Um for C... isnt it the starting point?
OpenStudy (camerondoherty):
like y starts with 4 soo...
OpenStudy (nikato):
yes. your y-intercept is the starting point of the plant
OpenStudy (nikato):
and the slope?
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OpenStudy (camerondoherty):
The slope is the height of the plant per hour of sunlight
OpenStudy (camerondoherty):
i think :/
OpenStudy (solomonzelman):
yes, and it is 3.
OpenStudy (nikato):
yes. but you could be more specific for this problem.
growth of 3cm per hour of sunlight
OpenStudy (camerondoherty):
oh ok
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OpenStudy (solomonzelman):
The slope is 3, in other words after for every x-unit there are 3 y-units. OR, for every hour, 3cm growth.
Saying -- it grows 3cm per hour.
The y-intercept is when `x` is equal to zero, or in other words, when zero hours passes -- at the start, the plant was 4cm. (because when x=0, y=4)
So the plant was 4cm initially, and grows 3cm every hour.
↓ ↓
y-intercept slope
OpenStudy (camerondoherty):
Oh ok... Thank You sooooo Much you two! I really appreaciate it!