Proportionality

In what form is the equation of a proportional relationship?

• y = mx + b

• y = kx

Which best describes the graph represented in this table?

•  proportional
• non-proportional

What is the constant of proportionality?

• $3
• $4
• $2
• $9

Which graph is proportional?

• A
• B
• C and D
• All of the graphs are proportional

In the equation y = 14x, what is the constant of proportionality?

• y
• x
• 14

Does this graph show a proportional relationship?

• Yes, because it is straight

• Yes, because it goes through the origin

• Yes, because it is straight and goes through the origin

• No, it is not

Does this graph show a proportional relationship?

• Yes, because it is a straight line

• Yes, because it goes through the origin

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

• No, it is not

Does this equation represent a proportional relationship?

y = 2 + 7x

• Yes, because it has a constant of proportionality

• Yes, because it will be a straight line

• No, because it will not be a straight line

• No, because it will not go through the origin

Which equation matches the graph?

• y = 7x
• y = 42x
• y = 6x
• y = 2x

What makes a graph proportional?

• Straight Line
• The line goes through (0,0)
• Curvy line
• Straight line and passes through (0,0)