Understanding Graphs and Scales

The video tutorial explains how to draw a graph using graph paper, focusing on Zen's weekly allowance data. It covers the choice of scale based on data range and grid lines, and demonstrates drawing vertical bars for each data point. The tutorial also discusses alternative scales and concludes that the chosen scale is optimal.

What is the length of each unit on the graph paper?

• One metre

• One inch

• One centimetre

• One millimetre

What is the first factor to consider when choosing a scale for the y-axis?

• The type of graph paper

• The color of the bars

• The number of kids

• The range of the data

What is the range of the data in Zen's example?

• 200

• 100

• 400

• 300

How many grid lines are needed to cover the range of data with the chosen scale?

• Six

• Five

• Seven

• Four

What is the scale chosen for the y-axis in the graph?

• One centimetre equals 30 rupees

• One centimetre equals 40 rupees

• One centimetre equals 60 rupees

• One centimetre equals 50 rupees

Which kid receives a weekly allowance of 150 rupees?

• Zen

• Asha

• Ben

• Carly

What is the maximum number of grid lines a scale should use?

• Eight

• Ten

• Six

• Five

What alternative scale was considered but not chosen?

• One centimetre equals 35 rupees

• One centimetre equals 40 rupees

• One centimetre equals 45 rupees

• One centimetre equals 55 rupees

Why was the alternative scale of 45 rupees per centimetre not preferred?

• It did not cover the range

• It was difficult to plot non-multiples of 45

• It required more than eight grid lines

• It was too simple

What is the best possible scale according to the video?

• One centimetre equals 60 rupees

• One centimetre equals 55 rupees

• One centimetre equals 50 rupees

• One centimetre equals 45 rupees