ratios and proportional relationships

Hadley is driving to Colorado. She has been traveling for 4 hours, and she has driven 260 miles. Find her speed in miles per hour.

• 85
• 65
• 60
• 70

Tags

CCSS.6.RP.A.3B

Write an equation in the form of y=kx for a line that passes through the ordered pair (3,9).

Hint:  $k=\frac{y}{x}$  

• y=1/3X

• y=6x

• y=3x

• y=9x

Tags

CCSS.7.RP.A.2C

What letter stands for "constant of proportionality"?

• y
• x
• b
• k

Tags

CCSS.7.RP.A.2B

Julio walks 2½ miles in 2 hours.

What is the unit rate in miles per hour?

• 1½ miles/hour

• 1¼ miles/hour

• 2 miles/hour

• ¾ miles/hour

Using the table above, determine the equation of the line.

Hint: Pick a point, write the ordered pair (x,y). Then find k.

• y = 5x

• y = 10x

• y = 1/5 x

• y = 1/10 x

The graph above shows the price of games in dollars. Is the graph proportional and how do you know?

• The graph is proportional because it is straight.

• The graph is proportional because it is straight and passes through the origin.

• The graph is not proportional because it does not pass through the origin.

• The graph is not proportional because it is not straight and it does not pass through the origin.

Tags

CCSS.7.RP.A.2D

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

• y = k+x

• y = k-x

• y = kx

• $y=\frac{k}{x}$

Tags

CCSS.7.RP.A.2C

Is the relation in the table proportional or non-proportional. If proportional what is the the constant of proportionality?

• Proportional; k = 20

• Proportional; k = 40

• Proportional; k = 2

• Non-Proportional

Tags

CCSS.7.RP.A.2B

How do you find k?

• $\frac{x}{y}$

• $\frac{y}{x}$

• y=kx

• x ⋅ y

Is the graph proportional or non proportional?

• proportional
• non proportional

Tags

CCSS.7.RP.A.2D