Introducing Proportional Relationships

The two lines represent the amount of water, over time, in two tanks that are the same size. Which container is filling more quickly?

• Container A because the line is longer.

• Container A because its graph is steeper.

• Container B because its graph is steeper

• Container B because it is closer to the x axis.

The table shows the weights of apples at a grocery store. If this represents a proportional relationship, what is the constant of proportionality?

• 1.2

• 8.3

• 0.12

• 1.44

The table shows the weights of apples at a grocery store. If this represents a proportional relationship, what is the weight of 12 apples in kg? (The bottom right box).

• 16.6

• 8.3

• 0.12

• 1.44

What is the constant of proportionality for the table?

• 14

• 7

• 2

• 1/7

What is the constant of proportionality for the table?

• 2/5

• 4

• 10

• 5/2

In the equation y = kx, what does the k represent?

• x-axis

• y-axis

• constant of proportionality

• I don't know because my teacher didn't stress it enough.

What is the constant of proportionality represented in this graph?

• 2

• 1

• not enough information given

• 1/2

Does this graph represent a proportional relationship?

• Yes, it is a straight line.

• Yes, it is a straight line and goes through the origin.

• No, it is a straight line but does not go through the origin.

• No, It is a straight line that formed a triangle.

The table shows the weights of apples at a grocery store. If this represents a proportional relationship, what is the weight of 2 apples in kg? (The top right box).

• 0.24

• 8.3

• 0.12

• 1.66

A recipe for salad dressing calls for 3 tablespoons of oil for every 2 tablespoons of vinegar. The line represents the relationship between the amount of oil and the amount of vinegar needed to make salad dressing according to this recipe. The point (1, 1.5) is on the line. What would you label the x-axis?

• salad

• dressing

• oil

• vinegar