How do you graph f(x)=2 \cdot 3^x?

1 Answer
Gió
Jan 14, 2015

Well, I would start by recognizing that the function will never become negative, i.e., for every value of x I may choose, y will always be positive.
So, basically, I'll have a graph in the first and second quadrant.
I'll now try to give values of x but choosing values that are "easy" to be calculated (try to avoid difficult stuff such as x=125, you won't calculate 3^125!).
You can use:
x=0 that gives you y=2 (3^0=1);
x=1 that gives you y=6;
And...
enter image source here

Or more formally:
graph{2*3^x [-5.165, 4.835, -0.96, 4.04]}

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