An insect walks along a number line. The insect begins seven units from the origin and then walks 11 units in one direction.

Question

The insect stops for a moment and then walks 4 units, not neccessarily in the same direction or in the opposite direction. Which of the following is not a possible value of the coordinate the insect ends on.

a) -14

b) -8

c) 0

d) 18

e) 22

Answer 1

Draw and label a diagram!!

The insect starts\ at either 7 or -7

The first walk ends at either -18, -4, 4 or 18

The final 4 units ends at -14, 0, 0, or 14.

Answer 2

D) 18

All other answers are possible end points. Trial and error.