A math lesson covering common core standard 8.S.P.3

1. Texting Olympics
Name______________________
Use the same website as yesterday:http://illuminations.nctm.org/ActivityDetail.aspx?ID=146
Our class is holding a Texting Olympics to find out who has the quickest thumb in the program. Is there a relationship
between texting speeds? Events include:
Sprint: Texting a straightforward message.
Hurdles: Texting a message that includes numbers, symbols, and punctuation.
Sprint Hurdles
Please pick me up after school Guess what? The vball team won
today. I have to stay for math help. state 3 to 1!!! Woooo:)
With a partner, record each other’s times for the events. Share your data with the class to complete the table.
Name Sprint Hurdles
(seconds) (seconds)
x y

2. What type of relationship is this data?_________________________
Was your class’s line of best fit close to the actual line of best fit?_________________
What is the equation of the line of best fit?_____________________
What is the y-intercept?___________________________
What does this mean? (use specific numbers and the words sprint seconds and hurdles
seconds)___________________________________________________________________________________
__________________________________________________________________________________________
What is the slope?_______________________________
What does this mean? (use specific numbers and the words sprint seconds and hurdles
seconds)___________________________________________________________________________________
__________________________________________________________________________________________
Equation: y = _________ x + __________
y represents_______________________
x represents_______________________
Using the equation above, if you texted a “sprint” text that took 28 seconds, how long would a “hurdles” text
take for that same person(label your answer!)? Compare this to the graph on the board.
Using the equation above, if you texted a “hurdles” text that took 32 seconds, how long would a “sprint” text
take for that same person (label your answer!)? Compare this to the graph on the board.