Which statement is true about the function f(x)= square root of x ? O The domain of the graph is all real numbers.
O The range vi no yıapn is all real numbers.
O The domain of the graph is all real numbers less than or equal to 0.
0 The range of the graph is all real numbers greater than or equal to 0.

3. find the radius of circle p.4. find y.

Pls will give brainliest and all p. s u can zoom in if u cant see plss

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?