Question

six random samples were taken each year for three years. the table shows the inferred population for each type of fish for each year.
which conclusion is supported by the data from the multiple - year samples? check all that apply.
the number of bass increased over time.
the number of bass decreased over time.
the number of catfish increased over time.
the number of catfish remained the same.
the fish population decreased over time.

year	population trout	population catfish	population bass
2	83	76	40
3	92	80	31

Explanation:

Step1: Analyze bass population

In year 1, bass population is 58, in year 2 it is 40 and in year 3 it is 31. Since 58>40>31, the number of bass decreased over time.

Step2: Analyze catfish population

In year 1, catfish population is 57, in year 2 it is 76 and in year 3 it is 80. Since 57<76<80, the number of catfish increased over time.

Step3: Analyze total fish population

Total population in year 1: 77 + 57+58 = 192. Total population in year 2: 83 + 76+40 = 199. Total population in year 3: 92+80 + 31=203. Since 192<199<203, the fish population increased over time.

Answer:

• The number of bass decreased over time.
• The number of catfish increased over time.