8th Grade Math Day Competition

Front

Type of association shown in the scatterplot?

Back

positive association

Front

Type of association shown by the graph: none, positive, negative, irregular

Back

negative

Front

Which relationship would most likely show a positive association?

• The distance a car traveled and the number of gallons of gas remaining in the car.
• The speed a train travels and the time it takes for it to reach its destination.
• The amount of data storage in a computer and the number of keys on a keyboard.
• The number of tickets sold for a football game and the number of refreshments sold at the game.

Back

The number of tickets sold for a football game and the number of refreshments sold at the game.

Front

The graph below shows the amount of money remaining, y, after purchasing x items. Using a linear model, which equation best fits the data? Options: y = ^-3x + 51, y = ^-3x + 45, y = ^-5x + 45, y = ^-5x + 51

Back

y = ^-5x + 51

Front

The graph shows the age and weight of an average child from birth to age 16. Which equation best fits the data? Options: y = x + 8, y = 2x + 10, y = 6x + 18, y = 8x + 8

Back

y = 8x + 8

Front

Using a linear model, what is the approximate height of a 10-month-old bamboo plant? Options: 10 ft, 11 ft, 13 ft, 16 ft

Back

13 ft

Front

Measure that BEST describes the slope of a graph showing traveling times and distances over 5 days.

Back

miles per hour

Front

What percentage of SUV's are driven by women? Options: 56.25%, 75%, 83.25%, 86.5%

Back

86.5%

Front

What percent of people who play an instrument do not play a team sport?

Back

27.2%

Front

How many total people were surveyed about what ice cream flavor they would pick?

Back

269