11/14 Lesson 2-4 Exit Ticket

In what form is an equation that relates two proportional quantities x and y?

• 𝑦=k+x, where k is the constant of proportionality

• y=kx, where k is the constant of proportionality

• 
  

  
  y=k/x, where k is the constant of proportionality

• y=x/k, where y is the constant of proportionality

Which equation represents a proportional relationship?

• 
  

  y = 7x – 3

• 
  

  y = 150x

• 
  

  y = 21/𝑥

• y = 2x + 1

The equation y = 0.25x describes a proportional relationship between x and y.
Given the equation, what is the constant of proportionality?

The constant of proportionality is ​ ________.

The equation 𝑦=5𝑥 relates proportional quantities x and y. What is the value of x when y is 4? The value of x is ​ ​ (a)   .

• 4/5
• 4
• 5
• 5/4

Shipping rates for Company A and Company B are shown in the tables below. Which company has shipping rates that you can represent using an equation of the form y = kx? Use the drop-down menus to show your answer.

​ (a)   ​ ; the ratios of cost to weight are​ (b)  

• Company B
• Equivalent
• Company A
• Not Equivalent