Proportionality in Tables and Graphs

What type of slope?

• negative

• positive

• undefined

• zero

Which of the following equations shows a proportional relationship?

• y = -7x - 5

• y = 8x + 2

• y = 7x

• y = -x - 6

What is the equation that represents this relationship?

• y = 1/12x

• y = 12x

• y = 0.6x

• This is not a proportional relationship.

Based on the graph, Which of the following statements is TRUE?

• I drove 80 miles every 4 hours

• I drove 160 miles in an hour

• I drove 80 miles every 2 hours

• I drove 240 miles in 4 hours

Write the equation for the table.

• y = x + 4

• y = 5x

• y = 4x + 1

• y = x + 5

Which of the following is an equation for this relationship?

• y=90x

• y=25x

• y=45x

• y=2x

Identify the constant of proportionality. Write your answer as y=kx

• y=14x

• y=7x

• y=2x

• y=6x

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $200 earned for every 2 hours worked
  is the unit rate

• $500 is earned for every 8 hours worked

• $300 is earned after working 4 hours

If the constant of proportionality is 7, which of the following is the correct proportional equation?

• y=7k

• y=k7

• y=kx

• y=7x

What is the unit rate in this proportional relationship?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour