Creating a Scatter Plot

Scatter Plot Characteristics

• dots represent a relationship between two types of data
• dot is graphed as an ordered pair (x,y)
• graph can have positive, negative, or no correlation
• a trend line may be able to be drawn to predict future events
• created on a coordinate graph with 2 axis (x and y)

Pros/Cons

Steps to Create

• organize data in numerical order
• Find the median (Q2)
• Find the median of the first half of data (Q1) and the last half (Q3)
• make a horizontal line and number it least-greatest
• put dots for least, greatest, Q1, Q2, and Q3
• Make a box from Q1 to Q3
• Make a vertical line at Q2 (median)

Practice A.

• 56, 32, 54, 34, 23, 67, 23, 45, 12, 32, 34, 24, 36, 47, 19, 43

Practice B.

• 8, 3, 13, 5, 4, 1, 5, 3, 10, 9, 2, 8, 15, 4, 8, 8, 4, 8

Reflect.