| Content Covered |
Text Book
 | Algebra I
- Chapter 5 Writing Linear Equations
5-7 Scatter Plots and trend Lines
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Online Resouces |
- Homework answer key
HW-5-7-Key.pdf problems 7 - 29, with more details for the
even problems 20-28. This is a pdf of the answers reviewed in class.
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Summary and Reminders |
Summary
- Slope-Intercept form of an equation: y = mx + b
- Point-Slope intercept form of an equation: y - y1 = m(x - x1)
- Standard form of an equation: Ax + By = C
- Parallel lines have the same slope
- Perpendicular lines have oppostite reciprocal slopes
Reminders
- Main things you will be quizzed/tested/assessed on include being able to
create a scatter plot from a table of data; identify from a scatter plot whether there seems to be a positive correlation, negative correlation, or no correlation.
- Over time, with more practice you will be able to interpret the correlation correficient and make judgements as to whether a linear model is appropriate for a group of data.
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Next Unit: Skills Quizzes : Systems of Equations
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| Quiz Name |
Skill Assessed |
Practice File |
Passing Grade |
Notes |
|---|
| Graphing |
Solve systems of equations by graphing; check the solution |
See homework assignments for practice problems
|
3 out of 4 |
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| Substitution |
Solve systems of equations using the substitution method; check the solution. |
See homework assignments for practice problems |
3 out of 4 |
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| Linear Combinations |
Solve systems of equations using linear combinations; this includes adding, subtracting, multiplication, division; check the solution. |
See homework assignments for practice problems |
3 out of 4 |
|
| Writing Systems of Equations |
Write a system of equations to model a problem; then solve the system and check the solution. |
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5 out of 6 |
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| Writing Systems of Equations |
Write a system of equations to model a problem; then solve the system and check the solution.
Sample: The difference of George's age and Madison's age is 9 years. The sum of 6 times George's age and 5 times Madison's age is 153. How old is each?
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Practice problem sets (PDF)
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3 out of 3 |
Practice problem set solutions (PDF) |
| Sample Word Problems |
For each of these word problems, students should be able to:
- Write a system of equations that models the propblem
- Choose an appropriate method for solving the system - graphing, substitution, linear combinations
- Solve the system (for all variables)
- Check the solution (in all equations) algebraically
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Samantha has $3.40 in dimes and quarters.
The number of dimes is 8 less than the number of quarters.
How many coins of each type does she have?
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A piggy bank has $4.30 in dimes and quarters.
If the number of dimes is 7 more than 2 times the number of quarters,
how many coins of each type are in the piggy bank?
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George's age is 5 times Kendell's age.
The sum of their ages is 48. Find the age of each.
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The difference of Jimmy's age and Linda's age is 10 years. The sum of 5 times Jimmy's age and 4 times Linda's age is 104. How old is each?
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There were 235 people at a movie to raise funds for the drama club.
Admision was $8.00 for each adult and $4.00 for each student.
The total receipts for all tickets was $1504.00.
How many adults and how many students attended?
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The length of a rectangle is 11 m less than 5 times the width. The perimeter is 434 m. Find the length and width of the rectangle.
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George scored 13 more points than twice as many as Roy did. Their combined score was 40 points. How many points did each score?
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The difference of Jen's age and Mark's age is 6 years. The sum of 4 times Jen's age and 3 times Mark's age is 108. How old is each?
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