Equations of Proportional Relationships

What is the value of "b" in the following equation:

y = 2x

• 2

• 1

• 0

• none of the above

What values would be in the next row?

• 11 & 16

• 10 & 22

• 10 & 20

• 11 & 22

Which of the following equations does NOT match the table?

• y = 25/2x

• y = 2/25x

• y = 12.5x

• y = 12.5x + 0

Which of these terms is NOT used to describe the "m" in the equation y=mx+b.

• Constant rate of change

• starting point

• unit rate

• Constant of proportionality

The variables x and y are proportional to one another. When x is equal to 33, the value of y is 11. Which of the following equations gives the relationship between x and y?

• y = 3x

• y=x+22

• y=x-22

The number of calories, c, in a handful of cheesy crackers is proportional to the number of crackers, n. If there are 150 calories in 27 crackers, which of the following expressions would give the number of calories in 20 crackers?

The number of calories, c, in a handful of chocolate chips is proportional to the number of chips, n. If there are 200 calories in 40 chips, which of the following expressions would give the number of calories in 30 chips?

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

What is the constant of proportionality for this table?

• 1/9

• 9

• 8

Which of the following is the correct formula for finding the constant of proportionality?

• k = x/y

• k = y/x

• y = k/x

• x = k/y