M8.1 DBA Review

The following diagram demonstrates the relationship between all real numbers. Which of the following statements is NOT true based on your knowledge of all real numbers? 8.2(A)

• All natural numbers are also rational numbers

• All rational numbers are real numbers

• All whole numbers are integers

• All rational numbers are integers

Four points are plotted on the number line.

Which point represents a value greater than  $\sqrt{69}$  but less than  $\sqrt{72}$  ? 8.2(B)

• Point M

• Point N

• Point P

• Point R

Four friends record the portion of their daily calorie consumption that they eat at breakfast.

Which list shows the results in ascending order? 8.2(D)

• Sofia, Laura, Rosa, Melinda

• Melinda, Rosa, Sofia, Laura

• Melinda, Rosa, Laura, Sofia

• Sofia, Melinda, Laura, Rosa

Mrs. Johnson placed the cards on a desk.

Which list shows the values in order from greatest to least? 8.2(D)

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Triangle DEF and triangle GHI are similar right triangles. Based on this information, which statement is true? 8.4(A)

• The slope of the hypotenuse of triangle DEF is less than the slope of the hypotenuse of triangle GHI

• The slope of the hypotenuse of triangle DEF is equal to the slope of the hypotenuse of triangle GHI

• The slope of the hypotenuse of triangle GHI is greater than the slope of the hypotenuse of triangle DEF

• The relationship between the slope of the hypotenuse of triangle GHI and the slope of the hypotenuse of triangle DEF cannot be determined

The graph shows the relationship between the number of calories, x, in a fast-food hamburger and the number of grams of fat, y.

What is the unit rate of the relationship between calories and grams of fat?

• 1/16 gram of fat per calorie

• 16 grams of fat per calorie

• 1 gram of fat per calorie

• 0.16 gram of fat per calorie

Ricardo is making his famous chili to take to a cookout. Each batch of chili requires 4 cups of beans. If x represents the number of cups of beans Ricardo uses to make y batches, which of the following graphs best represents the situation? 8.4(B)

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Pinky is a pig. She weighs 100 pounds and is underweight. The farmer put Pinky on a diet, and she gained the same amount of weight for 3 weeks in a row. The table shows Pinky's progress.

What is the y-intercept in this situation, and what does it represent? 8.4(C)

• 10; it represents Pinky's weight gain per week

• 3; it represents the number of weeks Pinky has been on this diet

• 100; it represents Pinky's beginning weight

• 130; it represents Pinky's weight after 3 weeks on this diet

Jana sells boxes of cookies for a school fundraiser. Each hour, she records the number of boxes sold. Jana's cookie sales are represented by the graph.

Which of the following shows the rate of Jana's cookie sales? 8.4(C)

• 10 boxes of cookies per hour

• 15 boxes of cookies per hour

• 20 boxes of cookies per hour

• 30 boxes of cookies per hour

• I only

• II and III only

• I and III only

• I, II, and III