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starboy1051
19.04.2021 •
Mathematics
PLEASE HELP
all you have to do is answer the questions at the bottom and I will give you brainleist
PART 1: MEASUREMENTS - Data Record
Name
Arm Span in Inches (x)
Height in Inches (y)
Student 1
65
66
Student 2
58
57
Student 3
61.5
61
Student 4
75
75
Student 5
61.75
62
Student 6
64
63
Student 7
71
68
Student 8
77
78
Student 9
65
66
Student 10
44
48
Yourself
80
79
Family/Friend
62
61
QUESTIONS
Which variable did you plot on the x-axis, and which variable did you plot on the y-axis? Explain why you assigned the variables in that way.
I plotted the arm span on the x axis and the height on the Y axis. I do not have an explanation as to why, that was just the default so I kept it.
Write the equation of the line of best fit using the slope-intercept formula y = mx + b. (Refer to Lesson- PAGE 3, the “Marathon” example, to determine the “Determine the Line of Best Fit” tab for help on choosing two points, finding slope and writing the equation of your best fit line) Show all your work, including the points used to determine the slope and how the equation was determined.
What does the slope of the line represent within the context of your graph? What does the y-intercept represent?
Bonus: Test the residuals of two other points to determine how well the line of best fit models the data.
Use the line of best fit to help you to describe the data correlation. (positive, negative, or no correlation)
According to your line of best fit (equation) that you found in, Question 2, approximate how tall is a person whose arm span is 66 inches? Show work using your equation in Question 2 to support.
According to your line of best fit, what is the arm span of a 74-inch-tall person? Show work using your equation in Question 2 to support.
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Ответ:
agarromas tero yubandaci
Step-by-step explanation: my soly colombi
Ответ:
Ответ:
This equation is in slope-intercept form, which is y = mx + b, where m is the slope and b is the y-intercept.
Note that parallel lines have the same slope.
The equation is y = 2x - 1; the slope is 2 and the y-intercept is (0, -1).
For our line parallel to the given line, we have y = 2x + b, as the slopes are the same. To find b (the y-intercept), plug the point on the line - (4, 2) - for x and y in the equation and solve algebraically for b.
y = 2x + b
2 = 2(4) + b
2 = 8 + b
-6 = b
We can now complete our equation!
y = 2x - 6
However, notice how the options aren't in slope-intercept form. Simply isolate and negate the constant to figure out which one is correct.
y = 2x - 6
y - 2x = -6
-y + 2x = 6
2x - y = 6
The equation of the line that passes through (4, 2) and is parallel to the line y = 2x - 1 is B) 2x - y = 6.