determine which of the following exponential formula(s) represents i, v, vi in the graph above.

Option: c is the correct answer.

        c.  φ, ε and δ

From the graph given to us we see that the graph passes through the same initial point that is the starting point is same i.e. when t=0.

Also, they attain the maximum value at t=0.

α:

Now when t=0 we have:

 Value=10

β :  

Now when t=0 we have:

 Value=10

χ:  

Now when t=0 we have:

 Value=10

δ:

Now when t=0 we have:

Value=30

ε:

Now when t=0 we have:

Value=30

φ:

Now when t=0 we have:

              Value=30

Hence, we see that δ , ε and φ are the three functions such that they have the same initial value.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^