Line of best fit & Correlation
Parallel and Perpendicular Lines
Slope
Slope intercept form
Point Slope form &Slopes of lines
100
Describe the correlation between the variables.
Negative correlation
100
Yes, same slope. Never intersect.
100
What is the slope of a horizontal line?
Zero
100
What is slope intercept form?
y=mx+b
100
What is one point on the line y-2 = -7(x -4)?
(4,2)
(0,30)
Many...
200
The line of best for my data is y=1.056x-3.665.
Predict the value of y when x=16
13.231
200
What lines have the same slope?
Parallel Lines
200
What is the slope of a vertical line?
Undefined
200
Write the equation in slope intercept form:
slope=0, y intercept =-5
y=-5
200
Write the linear equation in point slope form: Slope=-7 ; (4,2)
y-2=-7(x-4)
300
Use the data in this spread sheet to find the line of best fit-- you should be able to copy and paste.
https://docs.google.com/spreadsheets/d/1VFwM7Mx8HtoHFXeD_UIqJuvf1B2qNrgRDhfIKRkG91s/edit?usp=sharing
y=-0.0000596459x+4.27467
300
How do you know when you have perpendicular slopes?
When they are opposite reciprocals OR multiply to -1
300
Find the slope of (4,-2) and(-1,2)
What is -4/5
300
Write the equation in slope intercept form:
slope=4 and (2,5) is on the line
y=4x-3
300
Graph the line y+8=-4(x+2)
See Graph
400
Use the data in this spread sheet to find the correlation coefficient. Explain what this tells you about how the two quantities relate to one another-- you should be able to copy and paste.
https://docs.google.com/spreadsheets/d/1VFwM7Mx8HtoHFXeD_UIqJuvf1B2qNrgRDhfIKRkG91s/edit?usp=sharing
-0.00472
There is not much correlation between the two variables
400
Find the equation of the line parallel to y=3x+1 that passes through the point (-1,3).
y-3=3(x+1)
OR
y=3x
400
Find the slope of (20,3000) and (60,2000)
What is -25
400
Graph the equation: y= 4x-3
See graph
400
Write the equation of a line passing through (-1,-2) and (-2,-6) in point slope form
Point slope form: y+2= -4(x+1)
OR
y+6=-4(x+2)
500
Use the data in this spread sheet and the line of best fit to predict the output when x=250-- you should be able to copy and paste.
https://docs.google.com/spreadsheets/d/1_3uGHO946wc7WqgrjT7p87ss4PGLi9cXpkF7hnoVvPE/edit?usp=sharing
21.40076
500
Find the equation of the line perpendicular to y=-1/2x+7 that passes through the point (2,5)?
y-5=2(x-2)
OR
y=2x+1
500
Find the slope of the equation: 6x + 5y=30
What is 6/5
500
Write the equation of a line in slope intercept form that passes through the points (2,5) and (-1,6) and graph it.
y=-1/3x+6 1/3 See graph
500
Write the equation in point slope form and in slope intercept form: (1,-4) and (3,2)
Point slope: y-2=3 (x-3)
slope intercept: y=3x -7