Some triangles can have more than one obtuse angle

This statement is not correct.
an obtuse angle is an angle whose measure is greater than 90 and the sum of measures of three angles of the triangle is 180.
having one obtuse angle in the triangle actually means that the sum of the other two angles is less than 90.
this means that a triangle can have a maximum of one obtuse angle only.

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