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 the number of tick - mark intervals between A and B

There are 6 tick - mark intervals between A and B.

Step2: Use the formula for the length of a line segment

Let \(d\) be the distance between tick - marks. The length of segment \(AB\) is \(6d\). Given \(AB = 18\) units. So, \(6d=18\).

Step3: Solve for \(d\)

Divide both sides of the equation \(6d = 18\) by 6: \(d=\frac{18}{6}=3\) units.

Answer:

C. 3 units