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Alg. 1 CW#19 and Quiz
November 19, 2014
Quiz #18 1. What is the procedure for writing the equation of a line parallel to a given line and passing through a given point?
2. Write the equation of the line that is parallel to the line y = 3x ­ 2 and passes through the point (­6, ­5). • Use your notes!
• Find the slope of the given line. The slope of your new line
will be the same!
• Substitute the slope and the (x, y) coordinate pair into y =
mx + b and solve for b
• Simplify
• substitute m and b into y = mx + b
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Alg. 1 CW#19 and Quiz
November 19, 2014
Day / Date
Wednesday, November 19
Due Now
A#18: p. 322, #1 – 29 odd, 32, 33, 35, 36
Warm­Up
Finish Quiz #18 and Reflect
ClassworkDue: EOP CW#19: 5.6a p. 325
Homework Due: 11/21 A#19: p. 328, #1 – 15 all
Make Scatterplots and Write Equations To Learning Target Model Data
News and Notes
Unit 5 Test 12/3!
40 ­ 44 A
36 ­ 39 B
31 ­ 35 C
27 ­ 30 D
< 27 F
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Alg. 1 CW#19 and Quiz
November 19, 2014
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Alg. 1 CW#19 and Quiz
November 19, 2014
Algebra 1: 5.6 Questions
1. What is a scatterplot?
A graph used to determine if there is a
pattern in paired data values (x and y). Two
real-world variables plotted together on the
same graph.
2. What is correlation? What is the difference between positive, negative and no correlation? Strong or weak correlation?
Correlation: Linear association...the pattern
in the data values looks like a line.
strong
weak
positive
positive
No
Correlation
weak
negative
strong
negative
3. What is a line of fit? What is the procedure for finding the equation of a line of fit to model data?
Line of Fit: the line that best fits or models
the data pairs.
1. Make a scatter plot of the data values.
2. Decide if the data can be modeled by a
line.
3. Sketch a line that models the data.
There should be as many points above the
line as below it.
4. Pick any two points on the line (not
necessarily data points) and use them to
write a linear equation. You can use the
intersection of your line with the y-axis for b!
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Alg. 1 CW#19 and Quiz
November 19, 2014
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Alg. 1 CW#19 and Quiz
November 19, 2014
Association Association Association
correlation
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Alg. 1 CW#19 and Quiz
November 19, 2014
A#19: p. 328, #1 ­ 15 all
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Alg. 1 CW#19 and Quiz
November 19, 2014
Quiz #19
1. Create a scatterplot of the data in the table.
2. Find the equation of the line of best fit.
x
y
­2
­1
­1
3
0
4
1
8
2
10
3
13
8
Attachments
GraphPaper20x20AxesUnits.bmp
clipboard.galleryitem