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7.

4 Percent Equation
Objectives: 1.) Transfer the proportion set up to understanding the percent equation 2.) Correctly interpret and set up equations for percent problems 3.) Be able to analyze bar graphs 4.) Be able to conduct credible surveys

The percent equation


What number is 16% of 75?
a p b 100

Solve for a, that part of a whole

The percent equation


a = p%b a= still the part of the whole b = still the base p% is the percentage NEEDS TO BE CONVERTED TO A DECIMAL

Example:

Example

Bar Graphs
Bar Graph: A display of data using bars. Useful in representing parts of wholes and percentages.
Scholastic Online Poll: Major Concerns of Kids in this Election

Total Responses: 2133

Bar Graph Properties


A horizontal line (x-axis) and a vertical Line (yaxis) intersect to make an grid There are labels for the axis Numbers are spaced evenly apart to represent a scale Each bar represents a part of the whole

Example of a Circle Graph


Is global warming is serious issue that effects you? Data: Yes? No?

Make a Bar Graph


Is global warming is serious issue that effects you? Data: Yes? No?

Collecting Data
Compose a clear purposeful question to ask a group of people Make a tally chart Determine if you want a bar graph or a circle graph Make your graph using proper labeling and being organized and neat.

7.4 Page 347


Pg. 347 #1-7; 18-22; 29

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