Proportional Relationships Number Line

Which line shows a proportional relationship between x and y?

• Line L

• Line M

What makes a graph proportional?

• Straight Line

• The line goes through (0,0)

• Curvy line

• Straight line and passes through (0,0)

What is the equation y=kx for the table?

• y=1/3x

• y=3x

• y=5x

• y=1/5x

The table is​ ​ (a)   , because it ​ (b)   a constant ratio.

If so, what is the constant of proportionality?​ (c)  

• non-proportional

• proportional

• does not have

• has

• no constant

• k=14

Answer explanation

A proportional relationship means that two quantities maintain a constant ratio. In this case, the relationship does not exhibit a constant ratio, hence the answer is No.

If the constant of proportionality is 10, which of the following is the correct proportional equation?

• 10=kx

• 10=k

• y=10k

• y=10x

Which equation represents a proportional relationship?

• y = x + 3

• y = x - 9

• y = 7x

• y = 4x + 1

Does the graph show a proportional relationship?

• Yes, it's linear and goes through the origin

• Yes, it's linear

• Yes, it goes through the origin

• Yes, the line is pretty

What does k represent in the equation y = kx?

• constant rate of change

• constant of proportionality

• the equation

• x/y

Write an equation for this relationship.

• y=1/5x

• y=1/2x

• y=2x

• y=5x

What is the unit rate in this proportional relationship?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour