Question

You are 19 meters west of a stop sign when you start walking due east. Let d d represent the number of meters you have walked since you started walking due east. Write an expression (in terms of d d) that represents your distance to the east of the stop sign (in meters).

Answer 1

d-19

Explanation:

When d=0, your position is -19 meters east of the stop sign. When you walk d meters to the east, your distance east of the sign becomes ...

d - 19

_____

Note that you must walk more than 19 meters for your distance east of the sign to become positive. If you walk exactly 19 meters, your distance east of the sign is zero.