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Direct Variation

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Mathematics

9th Grade

Used 5+ times

Direct Variation
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15 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What does it mean if two quantities are directly proportional?

It means that the ratio of the two quantities remains constant.

It means that the two quantities are equal.

It means that one quantity increases while the other decreases.

It means that the two quantities are unrelated.

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

If y varies directly with x and y = 12 when x = 15, what is the constant of proportionality k?

0.5

0.6

0.8

1.0

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the constant of proportionality in the equation y = 7x?

5

7

10

3

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the significance of the origin in the graph of direct variation?

It indicates that when x = 0, y must also be 0.

It shows the maximum value of y when x is at its peak.

It represents the point where the graph intersects the y-axis.

It is the point where all values of x and y are negative.

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is an example of a direct variation in real life?

The relationship between distance and time when traveling at a constant speed.

The relationship between the amount of rainfall and the growth of plants.

The relationship between the number of hours studied and the score on a test.

The relationship between the temperature and the amount of ice in a drink.

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

How can you determine if a set of points represents a direct variation?

If the points form a straight line that passes through the origin, they represent a direct variation.

If the points form a curve, they represent a direct variation.

If the points are all positive, they represent a direct variation.

If the points are evenly spaced, they represent a direct variation.

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the formula to find the constant of proportionality k?

k = y/x, where y is the dependent variable and x is the independent variable.

k = x/y, where y is the dependent variable and x is the independent variable.

k = y + x, where y is the dependent variable and x is the independent variable.

k = y - x, where y is the dependent variable and x is the independent variable.

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