Real World Linear

Which equation has the greatest rate of change (slope)?

• y = 5x + 2

• y = -5x + 9

• y = 10x + 1

• y = -2x + 15

Which of the following are ways to find the rate of change?

• change in y over change in x

• rise over run

• subtract y coordinates over subtract x coordinates

• all of the above

At 0 seconds, Mrs. Taylor was 10 feet off the ground.  At 5 seconds, she was 20 feet off the ground.  What is her rate in feet per second?

• 10 feet per second

• 5 feet per second

• 2 feet per second

• 6 feet per second

At what rate did the rain fall?

• 2 cm per hour

• ¹/₄ cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

A strong cold front blew through during the night.  The temperature outside began to drop rapidly.  The graph shows the temperature at each hour after the cold front blew through.  What was the initial temperature recorded?

• 80 degrees

• 55 degrees

• 35 degrees

• 2.5 degrees

Find the slope of the line.

• Undefined

• 0

• 1

• -1

An electrician charges a fee of $75 plus $30 per hour of labor. Which equation models this?

A rental car company charges $28 per day plus a reservation fee of $100. Which equation models this?

A cell phone company charges a monthly fee of $50 plus $15 per gigabyte of data. Which equation models this?

• $360

• $470

• $720

• $1020