Final answer:
Interval A, (-2, -1.51), shows decreasing as the numbers move from larger to smaller values.
Step-by-step explanation:
The interval that shows decreasing is option A, (-2, -1.51) because it represents numbers that get smaller as they go from -2 to -1.51.
In this interval, the numbers are moving to the left on a number line, indicating a decreasing trend.
For example, if we pick two numbers within the interval, such as -1.75 and -1.6, we can see that -1.6 is smaller than -1.75, showing a decrease.