Which two-dimensionsal shape can be rotated about the y-axis to create a come

Which of the following points is collinear with (-2,1) and (0,3)

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?