Question

Kara wants to make a histogram of the number of students who wear blue shirts in her class throughout the week. She gathered the following information:

Day 1 4 students

Day 2 9 students

Day 3 5 students

Day 4 7 students

Day 5 6 students

What data would be on the horizontal axis?
names of the students wearing the blue shirts
the exact color of the blue shirt
school day
number of students wearing blue shirts

Answer 1

school day

Explanation:

When drawing a chart or a graph:

• x-axis: Independent variable
• y-axis: Dependent variable

The two given variables are:

• number of students who wear blue shirts
• days of the week

Therefore, in this scenario the independent variable is the school day and the dependent variable is the number of students since the former effects the latter.

So the data on the horizontal axis (x-axis) is: school day