Lesson 8 proportional graphs

Lesson 8 proportional graphs

Can we find the constant from a graph?

How do we find the constant from a graph?

Remember k is y/x or $\frac{Y}{x}$   

Find the constant

Remember y over x and simplify

Multiple Choice

Identify the constant of proportionality.

• k = 6

• k = 12

• k = 1/6

• k = 1/12

• none (not proportional)

Multiple Choice

What is the Constant of Proportionality?

• 46

• 92

• .02

• none, data is not proportional

Multiple Choice

What is the Constant of Proportionality for the table?

• 1/25

• 25

• 50

• 2

What did you notice about the previous graphs that were proportional?

Proportional graphs:

1. a straight line
2. passes through the origin on a graph
3. the origin is the point (0,0)

Multiple Choice

Determine if the graph represents a proportional relationship.

• Yes it does.

• No it does not.

Multiple Choice

Determine if the graph represents a proportional relationship.

• Yes it does.

• No it does not.

Multiple Choice

Which statement matches the graph?

• Taylor can write 6 words per minute

• Taylor can write 25 words per minute

• Taylor can write 50 words per minute

• Taylor can write 150 words per minute

Multiple Choice

What is the COP (constant of proportionality) of this graph?

• 4/3

• 1

• 4

• 3/4

Multiple Choice

What is k in this proportional relationship?

• 60 
• 120
• 1
• 180

Multiple Choice

What is the constant of proportionality for the following graph?

• 80

• 20

• 40

• 160

Multiple Choice

What makes a graph proportional?

• straight line

• The line goes through the origin

• Curvy line

• straight line and the line goes through the origin

Multiple Choice

What is the unit rate in this proportional relationship?

• 60 miles/1 hour
• 120 miles/ 2 hours
• 1 mile/ 1 hour

Multiple Choice

What is the unit rate for the rain fall?

• 2 cm per hour
• 1 cm per hour
• ¹/₂ cm per hour
• 4 cm per hour