Solve the quadratic equation -x^2=4

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

Find the domain and range of the following function f(x) = 51x - 21+ 4

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.