Which inequality represents all possible solutions of 81 ≥ -9x?

For the function, f(x) = -5x 2, find f(-4).

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?