Scatter Plots Worksheets Grade 8

1. A scatter plot shows the relationship between daily screen time (hours) and math test scores (percentage) for 25 eighth-grade students. The data points form a pattern that slopes downward from left to right, with most points clustered around an imaginary line. The line of best fit passes through points (1, 92) and (6, 67). What is the slope of this line of best fit?
2. (3.6 × 10⁴) ÷ (1.2 × 10²) = ?
3. (6.3 × 10⁵) ÷ (9.0 × 10²) = ?

…and 4 more problems

1. Liam is studying the relationship between study time and test scores. He collected data from 8 classmates and created a scatter plot showing study time (hours) on the x-axis and test scores (percentage) on the y-axis. The scatter plot shows a positive linear association with a line of best fit equation: y = 5x + 65. If Noah studied for 3.5 hours, what test score would the line of best fit predict for him?
2. Mere is investigating the relationship between the number of hours spent on social media per week and the number of books read per month among her classmates. She surveys 12 students and records their data. She creates a scatter plot with hours on social media on the x-axis and books read on the y-axis. The data shows a negative linear association. Mere draws a line of best fit that passes through the points (2, 8) and (10, 4). Based on this trend, how many books per month would you predict for a student who spends 6 hours per week on social media?
3. Emma records the number of pages read (x) and the time in minutes (y) for five books: (10, 15), (20, 30), (30, 45), (40, 60), (50, 75). Describe the association shown by the scatter plot.

…and 4 more problems

1. Mason records the number of hours studied (x) and the test score (y) for 8 students: (2, 62), (4, 72), (6, 77), (8, 82), (10, 87), (12, 92), (14, 97), (16, 102). Describe the association shown in the scatter plot of this data.
2. Isabella records the number of pages she reads each day and the time spent reading (in minutes). The data points are: (12, 15), (15, 20), (18, 22), (20, 28), (24, 30), (28, 35), (30, 38), (32, 42). Construct a scatter plot and describe the association between pages read and time spent reading.
3. Matiu is studying the relationship between the number of hours students spend reading each week and their scores on a reading comprehension test. He collects data from 10 classmates and creates a scatter plot with reading hours on the x-axis and test scores (out of 100) on the y-axis. The scatter plot shows a positive linear association. Matiu draws a line of best fit that passes through the points (2, 54) and (8, 78). Based on this trend, what reading comprehension score would you predict for a student who reads for 6 hours per week?

…and 3 more problems