PLEASE HELP What two transformations can a degree go through but remain the same?

Match the term on the left with its image or description on the right. match term definition diameter a) circle a and a line segment connecting points b and c which are on the circle. circumference b) circle a and a line segment connecting points b and c which are on the circle. radius c) a piece of the circumference of a circle secant d) two circles that share the same center. concentric circles e) the distance around a circle arc f) a segment between two points on a circle that passes through its center

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

What is the solution set of the quadratic inequality x^2-5< or equal to 0