Grade 9 Math: Introduction to Regression
This worksheet introduces Grade 9 students to the concept of regression, focusing on identifying relationships between variables, drawing lines of best fit, and making predictions.
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Standards
Topics
Introduction to Regression
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Date:
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Read each question carefully and answer to the best of your ability. Show all your work for short answer questions.
1. Which type of graph is typically used to display the relationship between two quantitative variables?
Bar graph
Histogram
Scatter plot
Pie chart
2. When points on a scatter plot generally rise from left to right, it indicates a correlation.
3. The line that best represents the trend in a scatter plot is called the .
4. Describe what a 'line of best fit' represents in the context of a scatter plot.
5. Consider the following data showing the number of hours studied (X) and the test scores (Y) for 5 students:
Student 1: (2, 60) Student 2: (3, 70) Student 3: (4, 80) Student 4: (5, 85) Student 5: (6, 90)
a) Plot these points on the graph below and draw a line of best fit.
b) Based on your line of best fit, predict the test score of a student who studied for 7 hours.
6. A negative correlation means that as one variable increases, the other variable also increases.
True
False
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