How do you know where a rational function will interest the y axis

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.