The function [tex]y=3(7)^x[/tex] is an exponential function. So, option (3) is correct.
Important information:
The given functions are:
We need to find the exponential function.
General form of an exponential function is:
[tex]y=a(b)^x[/tex]
The function [tex]y=3x-7[/tex] is a linear function.
The function [tex]y=3(7)^x[/tex] is an exponential function.
The function [tex]y=7x[/tex] is a linear function.
The function [tex]y=3x^2+7[/tex] is a quadratic function.
Thus, the option (3) is correct.
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