Proportionality Review

Proportionality Review

Constant of Proportionality

Writing equations

Interpreting Graphs

Poll

How do you feel about identifying the constant of proportionality from a table and a graph?

• I don' t understand at all

• I somewhat get it

• Easy, I got this!

Multiple Select

Identify if the following table is proportional and if so what the constant is.

• Yes

• No

• 1/7

• 7

Multiple Choice

What is the unit rate for the following graph?

• 1/3

• 1

• 3

• 6

Multiple Choice

What is the constant of proportionality for the following graph?

• 100

• 10

• 1/10

Multiple Choice

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

Multiple Choice

What does k represent in the equation y = kx?

• independent variable
• constant of proportionality
• dependent variable
• krispy kreme

Multiple Choice

Which graph is proportional?

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

Multiple Choice

What is the constant of proportionality?

• $3
• $4
• $2
• $9

Multiple Choice

Which best describes the graph represented in this table?

•  proportional
• non-proportional

Writing an equation from a table and graph

y=kx

k = constant of proportionality

Multiple Choice

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

Multiple Choice

The constant of proportionality can also be called the...

• Equation of a proportional relationship

• Unit Rate

• Origin

• Y-intercept

Multiple Choice

In what form is the equation of a proportional relationship?

• y = mx + b

• y = kx

Multiple Choice

Look at the table below. Write an equation to match the pattern between m, minutes and bubbles blown, b.

• b = 12(m)
• b= m +12
• b = m ÷ 12
• none of these

Multiple Choice

Nancy can type 50 words per minute. Look at the table below to write an equation that matches the data.

• m=50 + w

• w= 50m

• w= 50 + m

• m= 50 - w

Multiple Choice

What is the algebraic equation for this table?

• y = 480x
• x = y/480
• x + 480 = y
• 480 - x = y

Interpreting Graphs

• The x axis is the independent variable and what stands alone.

• The y axis is the dependent variable that is affected by the value of x.

• The point (1, k) shows you the constant and the unit rate

Multiple Choice

If a third line h is twice (2 times) as fast as line f, what would be the equation for line h ?

•  $y=2x$ 

•  $y=4x$ 

•  $y=8x$ 

• $y=\frac{1}{2}x$

Multiple Choice

What is the equation for line g ?

• $y=2x$

• $y=3x$

• $y=4x$

• $y=\frac{1}{2}x$

Multiple Choice

What is the equation for the ant's line?

• $y=2x$

• $y=\frac{1}{2}x$

• $y=3x$
  

• $y=\frac{1}{3}x$
  

Multiple Choice

How far was the ant at 4 seconds?

• 6 cm

• 8 cm

• 9 cm

• 12 cm

Multiple Choice

How far was the ladybug at 3 seconds?

• 2 cm

• 4 cm

• 6 cm

• 8 cm

Multiple Choice

What does the point (0,0) represent in context of the situation?

• No cookies were sold.

• No money is made selling cookies.

• No money is made when selling two cookies.

• No cookies were sold and no money was made.

Multiple Choice

Which of the following ordered pairs represents the unit rate?

• (0.50, 1)

• (2, 1)

• (1, 0.50)

• (1, 2)

Multiple Choice

True/False: The point (4 , 2) means that 4 cookies were purchased for $2.

• True

• False

Multiple Choice

What is the unit rate?

• 10

• 5

• 1

• 2

Multiple Choice

True/False: The point (1,0.5) means mix 0.5 quart of red paint with 1 quart of green paint.

• True

• False

Multiple Choice

True/False: The point (1,0.5) means mix 0.5 quart of green paint with 1 quart of red paint.

• True

• False