scatter plots grade 8 quiz

📚 Quick Study Guide

• 🔢 A scatter plot is a graph that displays the relationship between two sets of data.
• 📈 Each point on the scatter plot represents a pair of values. The x-coordinate represents a value from one data set, and the y-coordinate represents a value from the other data set.
• ➕ To create a scatter plot, plot each pair of data as a point on the coordinate plane.
• 📉 A positive association (or correlation) means that as one variable increases, the other variable tends to increase as well.
• ⛔ A negative association (or correlation) means that as one variable increases, the other variable tends to decrease.
• ⏺️ No association means there's no clear relationship between the two variables. The points appear randomly scattered.
• 〰️ A linear association means the points tend to form a straight line.
• 💫 A non-linear association means the points form a curve or other pattern that is not a straight line.

🧪 Practice Quiz

1. Which of the following describes a scatter plot?
   1. A) A graph that shows the distribution of a single variable.
   2. B) A graph that displays the relationship between two sets of data.
   3. C) A table that summarizes data.
   4. D) A graph that shows changes over time.
2. What does a positive association in a scatter plot indicate?
   1. A) As one variable increases, the other variable decreases.
   2. B) As one variable increases, the other variable increases.
   3. C) There is no relationship between the variables.
   4. D) The variables are inversely proportional.
3. What does a negative association in a scatter plot indicate?
   1. A) As one variable increases, the other variable increases.
   2. B) As one variable increases, the other variable decreases.
   3. C) There is a strong positive correlation.
   4. D) There is no relationship between the variables.
4. If the points on a scatter plot appear randomly scattered, what does this indicate?
   1. A) A strong positive association.
   2. B) A strong negative association.
   3. C) No association.
   4. D) A non-linear association.
5. What type of association is shown when the points on a scatter plot tend to form a straight line?
   1. A) Non-linear association.
   2. B) Quadratic association.
   3. C) Linear association.
   4. D) Exponential association.
6. In a scatter plot, the x-coordinate of a point represents:
   1. A) A value from the first data set.
   2. B) A value from the second data set.
   3. C) The mean of the data.
   4. D) The median of the data.
7. Which of the following is an example of data that could be represented on a scatter plot?
   1. A) The number of students in each grade.
   2. B) The temperature each day for a week.
   3. C) The height and weight of individuals.
   4. D) The number of cars of each color in a parking lot.