Question

where is the blue dot on the number line? -10.5 -11 -11.5

Explanation:

Step1: Determine the interval and step

The number line has marks at -10.5, -11, -11.5. The distance between -11 and -11.5 is $|-11 - (-11.5)| = 0.5$. Between -11 and -11.5, there are 5 small ticks (since from -11 to -11.5 is 0.5, each tick is $0.5\div5 = 0.1$).

Step2: Locate the blue dot

The blue dot is 3 ticks below -11. So we calculate: $-11 - 3\times0.1 = -11 - 0.3 = -11.3$.

Answer:

-11.3