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OpenStudy (anonymous):
23. Which kind of function best models the data in the table? Use differences or ratios.
x y
0 1.7
1 6.8
2 27.2
3 108.8
4 435.2
linear
quadratic
exponential
none of the above
hartnn (hartnn):
' Use differences or ratios.'
did you try ratios ?
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hartnn (hartnn):
6.8/1.7 =.. ?
OpenStudy (anonymous):
13.6 : 3.4
hartnn (hartnn):
whats that ?
6.8/1.7 =4
you'll get 4 for every y value/ x value
so, you can write the equation as y/ (x-1) = 4
or
y=4(x-1)
is this linear or quadratic or exponential ?
OpenStudy (anonymous):
oh wow i was going it completely wrong...
OpenStudy (anonymous):
and quadratic
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hartnn (hartnn):
umm...no ..a quadratic equation has ^2 (2nd power/exponent) in it
its not the case here.
OpenStudy (anonymous):
umm... im not sure i know what im doing
hartnn (hartnn):
you are trying to find what kind of model f(x) represents.
hartnn (hartnn):
* y represents
hartnn (hartnn):
y=4(x-1) is a linear equation.
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