Question
The equation of the line of best fit of a scatter plot is y = 12x + 7. What is the slope of the equation? (4 points)
−12
−7
12
7
−12
−7
12
7
Answers
Answer
The equation of the line of best fit of a scatter plot is y = −7x − 2. What is the the y-intercept? (4 points)
−7
−2
2
7
−7
−2
2
7
Answer
The scatter plot shows the relationship between the weekly hours of watching television and the weekly hours spent exercising, by the students of a high school:
A scatter plot is shown with the title Leisure Activities. The x-axis is labeled hours spent exercising, and the y-axis is labeled hours spent watching TV. Data points are located at 1 and 4, 2 and 6, 2 and 3, 4 and 3, 6 and 1, 4 and 5, 7 and 2, 0 and 6. A line connects the points 0 comma 6 and 8 comma 0.
What is the y-intercept of the line of best fit and what does it represent? (4 points)
6 hours; the number of hours students exercise when they do not watch television
6 hours; the number of hours students watch television when they do not exercise
8 hours; the number of hours students exercise when they do not watch television
8 hours; the number of hours students watch television when they do not exercise
A scatter plot is shown with the title Leisure Activities. The x-axis is labeled hours spent exercising, and the y-axis is labeled hours spent watching TV. Data points are located at 1 and 4, 2 and 6, 2 and 3, 4 and 3, 6 and 1, 4 and 5, 7 and 2, 0 and 6. A line connects the points 0 comma 6 and 8 comma 0.
What is the y-intercept of the line of best fit and what does it represent? (4 points)
6 hours; the number of hours students exercise when they do not watch television
6 hours; the number of hours students watch television when they do not exercise
8 hours; the number of hours students exercise when they do not watch television
8 hours; the number of hours students watch television when they do not exercise
Answer
The line of best fit for a scatter plot is shown:
A scatter plot and line of best fit are shown. Data points are located at 1 and 4, 2 and 6, 2 and 3, 4 and 3, 6 and 1, 4 and 5, 7 and 2, 0 and 6. A line of best fit passes through the y-axis at 6 and through the point 4 and 3.
What is the equation of this line of best fit in slope-intercept form? (4 points)
y = −6x + three fourths
y = 6x + three fourths
y = negative three fourthsx + 6
y = three fourthsx + 6
A scatter plot and line of best fit are shown. Data points are located at 1 and 4, 2 and 6, 2 and 3, 4 and 3, 6 and 1, 4 and 5, 7 and 2, 0 and 6. A line of best fit passes through the y-axis at 6 and through the point 4 and 3.
What is the equation of this line of best fit in slope-intercept form? (4 points)
y = −6x + three fourths
y = 6x + three fourths
y = negative three fourthsx + 6
y = three fourthsx + 6
Answer
The graph shows the number of cups of coffee Sherwin consumed in one day and the number of hours he slept that same night:
A scatter plot is shown. Data points are located at 1 and 9, 3 and 5, 5 and 6, 4 and 4, 2 and 7, and 6 and 4. A line of best fit crosses the y-axis at 10 and passes through the point 6 and 4.
How many hours will Sherwin most likely sleep if he consumes 9 cups of coffee? (4 points)
1, because y = −x + 10
2, because y = −x + 10
9, because y = −x + 10
10, because y = −x + 10
A scatter plot is shown. Data points are located at 1 and 9, 3 and 5, 5 and 6, 4 and 4, 2 and 7, and 6 and 4. A line of best fit crosses the y-axis at 10 and passes through the point 6 and 4.
How many hours will Sherwin most likely sleep if he consumes 9 cups of coffee? (4 points)
1, because y = −x + 10
2, because y = −x + 10
9, because y = −x + 10
10, because y = −x + 10
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