A pediatrician wants to determine the relation that may exist between a child's height and head circumference. She randomly selects 5 children and measures their height and head circumference. The data are summarized below. Height (inches), x: 25 27.75 25.5 26 27.5
Head Circumference (inches), y: 16.9 17.6 17.1 17.3 17.5

Treating height as the explanatory variable, x, use technology to determine the estimates of b0 and b1.

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Which number produces a rationale number when multiplied by 1/5

Which expression is not a polynomial?