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)

Jim is painting the inside of a circular helicopter pad. how many cans of paint would he need if the pad is 50 feet across and each can of paint covers about 200 ft2.

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at __ link to graph: .

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?