CBA 6 Review

Independent values =

• x values

• y values

Answer explanation

Independent variable = hours

Independent values = 1 hour, 2 hours, 3 hours, etc.

A child wants to collect at least 8 rocks for his collection. The child has already collected 2 rocks. Which inequality describes this situation?

Answer explanation

AT LEAST means greater than or equal

EX: If you need to be AT LEAST 13 to download an app, you can be 13 or older.

Which graph best represents the relationship between x and y in the equation

y = 3.5x ?

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Answer explanation

Find the unit rate.

What is y when x = 1?

In this problem y should be 3.5 when x = 1.

Alma reads 2 books each week. Which number line best represents the number of weeks it will take her to read at least 28 books?

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Answer explanation

AT LEAST means greater than or equal to

Ex. If you need AT LEAST a 70 to pass a class, you can earn a 70 or higher.

The graph shows the cost to rent a surfboard for different amounts of time.

Which list best represents the dependent values of the graphed points?

• 1, 7.50, 2, 15, 3, 22.50, 4, 30, 5, 37.50, 6, 45

• 5, 10, 15, 20, 25, 30, 35, 40, 45

• 7.50, 15, 22.50, 30, 37.50, 45

• 1, 2, 3, 4, 5, 6

Answer explanation

Dependent values represent the dependent variable which is dollars in this situation.

Dependent = y values

Saritha will construct a rectangle that has a height of 4 units and an area of up to 48 square units. Which inequality represents all the possible lengths in units of the bases, b, that Saritha can use to construct this rectangle?

Answer explanation

Area of a rectange = bh

The back of a window is shaped like a trapezoid. The dimensions of the back of the window are shown in the diagram.

Write an equation for A, the area of the back of the window using the given dimensions.

Answer explanation

Area of a triangle = 1/2 (b1 + b2) h

Mr. Smith has $50 to spend at a museum. A ticket to the museum costs $7. He can spend p dollars to buy other things at the museum.

Which inequality can be used to find the possible values for p?

Answer explanation

You cannot spend more than you have.

So what you are spending MUST be less than or equal the amount of money you have.

Solve this inequality:

3x < 33

Answer explanation

3x means we are multiplying 3 and x.

To solve for x, we must do the opposite operation,

which is dividing by 3 on both sides.

The front windshield is in the shape of a rectangle. The windshield has an area of A square feet. The width of the windshield is 6 feet.

Which equation represents this situation when h = height?

Answer explanation

Area of a rectangle = bh