For this case what you should know is that both functions are of the potential type.
We have then that
y = 2 * 2 ^ x This function grows exponentially upwards.
y = -2 * 5 ^ x This function grows exponentially downwards.
Answer See attached graphics.
4/5 -3/7=
28/35 -15/35
=13/35
The answer is 1.524157875019e16
The length of the curve is given by
Answer: 4
Step-by-step explanation: You can test whether any graph is a function using the vertical line test, where you simply draw a vertical line through the graph. If you see that the vertical line comes in contact with the graph more than once at any given x-value, you know it isnt a funciton.