Interpreting Bar Graphs

What is the purpose of a bar graph?

• To compare different categories or to show changes over time.

• To find the mean

• To compare length

• To measure temperature

How are the data values represented on a bar graph?

• The length of the bars

• The color of the bars

• The distance between the bars

• The width of the bars

Which conclusion can be drawn from the information given?

• Oscar completed more passes than George and Jordan combined.

• Hector completed more than 1/2 of his passes.

• Jordan and Oscar combined to complete more passes than Hector attempted.

• Hector attempted more passes than the other 3 completed altogether.

What are the key components of a bar graph?

• title, legend, gridlines

• horizontal or vertical axis, bars, labels

• numbers, shapes, colors

• dot plot, lines, points

Based on the facts in the graph, which is a valid conclusion?

• Brand Z is the most expensive brand for this year.

• Out of the 3 brands studied, Brand X remains the least expensive.

• Brand Z is consistently more expensive because it contains more nutrients.

• From last year to this year, Brand X had the greatest increase in cost.

Based on the information in the graph, what percentage of students selected sausage as their favorite pizza topping?

• 79%

• 29%

• 36%

• 64%

How can you calculate the MEAN from a bar graph?

• Multiply all the values and divide by the total number of values.

• Take the highest value and divide by the total number of values.

• Add up all the values and divide by the total number of values.

• Subtract all the values and divide by the total number of values.

The Sneaker Corporation graphed sales of each color of shoe they made.

Which statement is NOT supported by the data?

• White sneakers sold four times greater than green sneakers.

• One-third of the total number of sneakers sold were black.

• A little less than 50% of the sneakers sold were red or black.

• Green, red, or blue sneakers make up 500 of the sneakers sold.

Parker conducted a random survey at the mall to determine the number of songs in each genre that were downloaded by 40 students.

Based on the information in the graph, which inference about the general population of students is valid?

• Girls like country music more than all other genres combined.

• More girls than boys like rock music.

• Boys like country music more than rock music.

• Boys like rock music more than girls like rap music.

The graph shows the favorite colors chosen by some middle school students.

Which statement is supported by the information in the graph?

• Fewer than 30% of the students chose red, yellow or orange as their favorite color.

• More than 1/10 of the students chose pink as their favorite color.

• Exactly 18% of the students chose blue as their favorite color.

• Exactly 2/5 of the students chose green, black or purple as their favorite color.