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OpenStudy (alexalas):
it is kind of simple.
fill in x with the x coordinates and see which exponential function lands on that point.
remember (x,y).
so what does \[y=3(4)^{x}\]
when x =2
do the same for all the equations
OpenStudy (alexalas):
hello?
OpenStudy (howard-wolowitz):
im here, just trying to get it right
OpenStudy (howard-wolowitz):
ok so you just take each solution and sub in 2 for the x?
OpenStudy (howard-wolowitz):
for the second one I got y=72
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OpenStudy (alexalas):
I am here
OpenStudy (howard-wolowitz):
or do you graph each one and see if those points meet with the 2 sub in for x
OpenStudy (alexalas):
both work
OpenStudy (alexalas):
sub 2 for x then sub 3 for x.
OpenStudy (howard-wolowitz):
each time i did it I didnt get points on a graph, but instead whole numbers
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OpenStudy (howard-wolowitz):
UNLESS you take each point and match them up
OpenStudy (howard-wolowitz):
for the second half of the 2 and the 3
OpenStudy (alexalas):
well if you sub 2 for x the answer will be y
for example y=2x and we substitute x with 2, y=2(2), y=4
OpenStudy (alexalas):
when graphing the coords are (x,y)
OpenStudy (howard-wolowitz):
that's confusinsg
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OpenStudy (alexalas):
so if the coords are (2,24)
x=2 and y=24
OpenStudy (howard-wolowitz):
ok let me try that give me one minute plz
OpenStudy (howard-wolowitz):
The answer is C
OpenStudy (alexalas):
yes
OpenStudy (howard-wolowitz):
awesome
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