Match each given function with the description of its graph y-intercept (2,0) graph initially decreases slowly and then decreases rapidly

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?

Find two consexutive odd integers such that the sum of their square is 650

What is the value of the discrimination for the quadratic equation 0=×2+2+×2