Question

to support a shelf, the diameter of a bolt can measure anywhere from 0.2 cm less than 1.5 cm to 0.2 cm greater than 1.5 cm. which graph represents the possible measures of the diameter of the bolt?

Explanation:

Step1: Calculate lower bound

$1.5 - 0.2 = 1.3$

Step2: Calculate upper bound

$1.5 + 0.2 = 1.7$

Step3: Identify interval type

The problem states the diameter can be anywhere from 0.2 cm less than 1.5 cm to 0.2 cm greater than 1.5 cm, which includes the bounds. So the interval is $1.3 \leq d \leq 1.7$, represented by closed dots at 1.3 and 1.7, with a line connecting them.

Answer:

The third graph (with closed dots at 1.3 and 1.7, and a line segment between them)