Question

line segment ab measures 18 units. what is d, the distance between tick marks on the number line? 1 unit 2 units 3 units 9 units

Explanation:

Step1: Count tick - mark intervals

There are 9 intervals between A and B.

Step2: Calculate distance per interval

Since length of AB is 18 units, and number of intervals is 9, we divide the total length by the number of intervals. So $d=\frac{18}{9}$.

Answer:

2 units