Looking to simplify only. not to solve

Note that 

x^a
= x^(a-b)
x^b

Therefore, 

x^15
= x^7.     Please treat the y factors similarly to obtain the final ans.
x^8

both graphs increase on their domain

neither graph has a y-intercept

step-by-step explanation:

the following points can be visualized easily from the graph

there is a hike in both the graphs so the graphs are increasing on their domain.x-intercept of log x and log 6x are differentthere is a vertical asymptote of both the graphs so there is no y-interceptas both the graphs are increasing so there is no horizontal asymptote