What is the domain of the relation? {(0, –1), (1, –2), (1, 0), (1, 2), (2, 1)} {a, b, c, d, e} {0, 1, 2} {–2, –1, 0, 1, 2}

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.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how