WILL GIVE BRAINLIEST TO 1st ANSWER PLEASE HELP! Which set of pairs is linear and non-linear

1. (2,1), (3,4), (5,6), (2, 7)

2 (3,1), (−3, 1), (0,1), (5,1)

3 (1,1), (2,2), (3,3), (4,4)

4. (4,1), (6, 7), (8, 9), (4,7)

(2,4), (2,5), (2,6), (2,8)

Part a : solve - vp + 40 < 65 for v . part b : solve 7w - 3r = 15 for r show your work!

If angle 2=3x +1 and angle 3=2x +4what is angle 2

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.