One focus of a hyperbola is located at (−6, 2). One vertex of the hyperbola is located at (−4, 2). The center is (−1, 2).

What is the equation of the hyperbola?

(x+1)^2/16 - (y-2)^2/9 = 1

(x+1)^2/9 - (y-2)^2/16 = 1

(x-2)^2/16 - (y+1)^2/9 = 1

(x-2)^2/9 - (y+1)^2/16 = 1

Which is the graph of the function y=2(4)^x

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old