Ameasure of how tightly clustered a group of scores is around their mean is called the a. frequency b. standard deviation c. mode d. variability

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)