Graphing Proportional Relationships in 8th Grade Math

What is the value of y when x is 0 in the equation y = 2.5x?

• 10

• 5

• 2.5

• 0

If x increases by 1, by how much does y increase in the equation y = 2.5x?

• 1

• 5

• 2

• 2.5

What is the unit rate of change of y with respect to x in the equation y = 2.5x?

• 5

• 2

• 1

• 2.5

Which of the following best describes a proportional relationship?

• y is equal to x squared

• y is equal to x plus a constant

• y is equal to some constant times x

• y is equal to a constant

In the equation y = 2.5x, what is the slope of the line?

• 1

• 5

• 2

• 2.5

If x changes from 0 to 2, what is the change in y in the equation y = 2.5x?

• 10

• 2

• 5

• 4

What happens to y if x changes from 0 to 5 in the equation y = 2.5x?

• y changes by 5

• y changes by 2

• y changes by 10

• y changes by 12.5

Which statement is true about the graph of y = 2.5x?

• A change of 5 units in x results in a change of 2 units in y

• The slope of the line is 2.5

• The unit rate of the relationship is 2/5

• The equation does not represent a proportional relationship

What is the correct unit rate of change of y with respect to x in the equation y = 2.5x?

• 2/5

• 5/2

• 2.5

• 1/2

If x changes by 2 units, what is the change in y in the equation y = 2.5x?

• 5

• 4

• 10

• 2