14. (07.06 MC) An unknown number x is at most 30, which graph best represents all the values of x? (1 point)
-50 40 30 20 -10
0
10 20 30 40 50
50 40 30 20 10
0
10 20 30 40 50
50 40 30 20 10
0
10 20 30 40 50
-50 40 30 20 -10
0
10 20 30 40 50