Proportionality

In what form is the equation of a proportional relationship?

• y = mx + b

• y = kx

Tags

CCSS.7.RP.A.2D

How do you know if a table is proportional?

• x-y is the same for each ordered pair

• The cross products are equal

• x + y is the same for each ordered pair

• It has a constant of proportionality

Tags

CCSS.7.RP.A.2A

How do you write the equation for a proportional table?

• Find k and plug into y = kx

• Find (x, y ) and plug into the equation y = kx

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

How do you find the constant of proportionality for a graph?

• Pick a point on the line and use the formula x/y

• Pick a point on the line and use the formula y/x

Tags

CCSS.7.RP.A.2B

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

Tags

CCSS.7.RP.A.2D

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

Tags

CCSS.7.RP.A.2D

What is the constant of proportionality for the following table?

• k = 2/3

• k = 3

• k = 2

• k = 3/2

Tags

CCSS.7.RP.A.2B

What is the Constant of Proportionality?

• k=46
• k=92
• k=0.2
• not proportional

Tags

CCSS.7.RP.A.2B

What is the constant of proportionality?

• $3
• $4
• $2
• $9

Tags

CCSS.7.RP.A.2B

Which equation matches the given graph?

• y=0.45x
• y = ²/₅x
• y = 4x
• k = ¼

Tags

CCSS.7.RP.A.2D