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6.7 – Percent and Problem Solving: InterestSimple Interest:
Simple Interest .Principal= Interest Rate
Total Amount +Principal= Interest
Principal: $600.00 Interest Rate: 4%
Interest = $600.00 . 0.04
Interest = $24.00
= 0.04
Total Amount = $600.00 + $24.00
Total Amount = $624.00
. Time
Time = 1 year
61.25
Simple Interest
875.00 + 306.257%1181.25
Find the simple interest and the total amount paid on a five year loan of $875 at a rate of 7%.
Total Amount
.$875
875 . 0.07
$306.25
$1181.25
6.7 – Percent and Problem Solving: Interest6.7 – Percent and Problem Solving: Interest
. 5
. 5
. 5
306.25
Simple Interest
1500.00 + 225.0020%1725.00
A student borrowed $1500 for nine months on a credit card. The interest on the credit card is 20%. How much interest was paid and what was the total amount?
Total Amount
.$1500
225.00
$1725.00
6.7 – Percent and Problem Solving: Interest
. 9/12
0.2.$1500 . 0.75
300 . 0.75
$225.00
Simple Interest
2100.00 + 136.5013%2236.50
If $2100 is invested at a simple interest rate of 13% for six months, what is the value of the investment at the end of the six month period?
Total Amount
.$2100
136.50
$2236.50
6.7 – Percent and Problem Solving: Interest
. 6/12
0.13.$2100 . 0.5
273 . 0.5
$136.50
7.1 – Reading Pictographs and Bar Graphs
Pictograph: A graph that uses symbols to represent the data.
Key or Legend: Explains the meaning of the symbol used in the pictograph.
How many people ordered cheese pizza?
What kind of pizza had the most orders?
What 2 kinds of pizza had the same number of orders?
7.1 – Reading Pictographs and Bar Graphs
25
pepperoni
cheese and sausage
7.1 – Reading Pictographs and Bar Graphs
What is the second most popular apple in the store?
How many Golden Delicious apples are carried by the store?
Jonathan
25
7.1 – Reading Pictographs and Bar Graphs
Bar Graph: A graph that uses vertical or horizontal bars to represent data. Each bar requires a label to identify it.
Scale: A horizontal or vertical number line used to read the data from the bar graph.
7.1 – Reading Pictographs and Bar Graphs
How many students watch 12–14 hours of TV? How many watch 6-8 hours? What range is the largest and how many students watch?
30
22
9-11 hours with 32 students
7.2 – Reading And Drawing Circle GraphsCircle Graph: A graph that uses a circle to represent the data as a whole.
Each sector (pie piece) shows a category and its relative size to the other categories.
45%
15%
20% 2.5%
15%
2.5%
The most common data presentation is as a percent.
7.2 – Reading And Drawing Circle GraphsCircle Graph: A graph that uses a circle to represent the data as a whole.
Each sector (pie piece) shows a category and its relative size to the other categories.
Another presentation is to show the data for each category.
90
30
40
30
55
7.2 – Reading And Drawing Circle GraphsIf percentages are used, there is no way to calculate the numerical size of each category without a sample size.
A Family's Weekly Expenditure: Mortgage, Food and Fuel
Expense $ Fraction Degrees Percent
Mortgage 300
Food 225
Fuel 75
600300
81600
75
83600
225
21
3602
1 x 3602 x 180x
3608
1 x 3608 x 45x
3608
3 x 10808 x 135x
180
13545
%1002
1 2
%100%50
%1008
1 8
%100%5.12
%1008
3 8
%300%5.37
%50
%5.37%5.12
7.2 – Reading And Drawing Circle Graphs
A Family's Weekly Expenditure:Mortgage, Food and Fuel
Expense $ Fraction Degrees Percent
Mortgage 300
Food 225
Fuel 75
600300
81600
75
83600
225
21
180
13545
%50
%5.37%5.12
7.2 – Reading And Drawing Circle Graphs
A Family's Weekly Expenditure:Mortgage, Food and Fuel
Expense $ Fraction Degrees Percent
Mortgage 300
Food 225
Fuel 75
600300
81600
75
83600
225
21
180
13545
%50
%5.37%5.12
7.2 – Reading And Drawing Circle Graphs