To answer this question, we need to know that as x tends to infinity
the exponential values greatly increase with each passing x.
So the exponential values will always be greater than the linear values, as x increases.
Lets see that with an example
Suppose we have
y1 = 2*x
y2 = 2^x
If we evaluate at x = 5, we can see the difference between the two
y1 = 2*(5) = 10
y2 = 2^(5) = 32
If x = 10, the difference becomes even clearer
y1 = 2*(10) = 20
y2 = 2^(10) = 1024
To order the exponential graphs, we need to place ourselves at an specific value of x and check which graphs has the highest corresponding value of y
So the answer to your question, which is to place in descending order according to the value of y:
*green
*orange
*blue
*red
*yellow
*black