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)

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. solve this quadratic equation using the quadratic formula. 2x2 - 2x=1 need asap

Suppose that the function f is defined. , for all real numbers, as follows. _ \ 1/4x² -4 if x≠ -2 f(x)=< /_-1 if x=-2 find f(-5), f(-2), and f(4)

From a group of 10 men and 8 women, 5 people are to be selected for a committee so that at least 4 men are on the committee. howmany ways can it be done?