Which of these tables represents a function?

a. z

b. y

c. x

d. w

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Simplify this expression. 8x 16(x + y)

Consider the linear function that is represented by the equation y= 4x+5