Question

this graph shows the results of an investigation in which an unknown species of bacteria was grown for 24 hours. what is the independent variable in this investigation? * 1 point graph with y - axis labeled number of bacterial colonies and x - axis labeled temperature (°c). options: (circle) time, (circle) temperature, (circle) number of bacterial colonies

Explanation:

The independent variable is the one manipulated in an experiment. Here, the graph's x - axis is temperature (°C), and the y - axis is the number of bacterial colonies. Time is constant (24 hours). So temperature is the independent variable as it's the factor being changed to observe its effect on bacterial growth.

Answer:

temperature (the option with "temperature" as the text)