4. the graph of an exponential function is given. which of the following is the correct equation of the function? 5. compute the exact value of the function for the given x-value without using a calculator. show your work for full credit. (2 points) f(x) = 7x for x = 2

B

Step-by-step explanation:

EDGE 2020

For the first point, remember this simple rule: every exponential function always returns when evaluated at . In fact, for every possible base .

So, we can see that the graph of the exponential passes through the point where appears to be between 1 and 2. So, the only feasible option would be , because it passes throught the point because .

The other functions are wrong because:

As for the second question, you simply have to plug in the values: the function

means that you have to choose an input, x, and use it as exponent for 7. So, if you choose x=2, it means that you have to give exponent 2 to 7, i.e. you replace the x with the specific value, 2.

So, the expression becomes

step-by-step explanation:

a

step-by-step explanation: