Umm I'm stuck on this project. can you help?

Which statements about these triangles is true

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2