October 15th Math Studies

Bell Ringer

You estimate that your walking speed is 6 mi per hour you live 2 miles from school and you arrive in 18 minutes, what is your actual

1. Speed in miles per hour?

2. What is the error in your estimate?

remember under estimate---> negative error

3. What is the percentage error in your estimate?

Answer

2 miles 6 miles per hr

2minutes 18 minutes

6/60 .1mile/min .9miles/9minutes

2/18 1mile/9min -.1/9

(+.1/9)

_____ = 11.9% in minutes

(.9/9)

Homework

Review set 2A p.64 ( due Monday)

Question:

Do you UNDERSTAND how to find a percentage error in your estimate?