Constant of Proportionality from Tables Graphs

What is the constant of proportionality? 

• 6

• 3

• 2

• 1/2

The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2

What makes a graph proportional?

• Straight line

• The line goes through the origin

• Curvy line

• Straight line and the line goes through the origin

A proportional relationship can be written as an equation in the form ____ = _____  _____

• y = k+x

• y = k-x

• y = kx

• y = k/x

Which part of proportional relationships do you feel you need more help with?

Tables - Finding the constant

Tables - Writing the equation

Graphs - Finding the constant

Graphs - Finding the constant and writing the equation

I don't need any help... I know how to do all of it!!

The table represents the price of McDonald's Value Meals. What is the constant of proportionality?

• 5.25

• 10.50

• 5

• 2

Which tables and graphs show a proportional relationship?

• A,C,F

• B,D,E

• B,C,F

• A,B,D

Albert wants to buy some pens. He compares 4 different packs of pens. Which two packs of pens have the same cost per pen?

• Packs 1 and 2

• Packs 1 and 3

• Packs 2 and 4

• Packs 1 and 4

A library charges a fine of 5 cents per day for each book that is returned late. Which fine is incorrect based on the proportion the library uses?

• 15 cents for 3 days late

• 30 cents for 6 days late

• 45 cents for 11 days late

• 60 cents for 12 days late

The graph shows the distance a train travels over time. How fast is the train traveling?

• 25 miles per hour

• 90 miles per hour

• 50 miles per hour

• 45 miles per hour