Find the missing angle
Plz help

Ineed with math stuff it involves graphs

Which of the following circles have their centers in the third quadrant? check all that apply.

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.