a^x is growth if a > 1
a^x is decay if a < 1
a^x passes through (0,1) for any value of a.
Determine whether each function is an example of exponential growth or decay. Then find the y-intercept.
a) y = 2(4)^x
growth or decay
y-intercept: b) y = 3(.25)^x
growth or decay
y-intercept:
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