Chapter 3: Linear Functions Name
Section 3: Slope as Rate of Change Date
Topics in Algebra 1 © 2001 Texas Instruments Student Worksheet 3-22
³
Try-It!
é
on Your TI
.
73
See the section on
Slope Using Coordinates
to find out how to use your calculator to find the slope
of a line containing two given points. Review the keystrokes. Use these keystrokes to compute the
rate of change for each pair of data points given. Include the correct units with your answer.
1.
x (seconds) y (feet)
2.
x (hour) y (phone calls)
10 6.72 2 18
20 8.05 4 25
Rate of Change _______________________ Rate of Change _____________________
3. A space shuttle has an average velocity of 25,405 ft/sec. The velocity of a car on a highway
can be 60 mi/hr. To find out how many times faster the space shuttle travels compared to the
car, you must convert the speed of the space shuttle to miles per hour. First, look at the
conversion by hand, and then do it on the calculator. When set to
Float
, the calculator shows
the answer to five decimal places.
25,405
ft
sec
Q
60 sec
1 min
Q
60 min
1 hr
Q
1 mi
5280 ft
= 17321.59091
mi
hr
To Do This Press Display
(TI
.
73 shown)
1. Exit the Topics in Algebra 1
application and clear the Home
screen.
y
l
á
EXIT
â
:
2. Enter the velocity, 25,405 on the
Home Screen.
25405
3. Open the
CONVERSIONS
menu, and
select the category,
Speed
.
-
‚
7
:
Speed
4. Select the units you are converting
from
,
ft/sec
.
1:ft/sec
5. Select the units you are converting
to
,
mi/hr
.
25,405 ft/s rounded to tenths is
17321.6 mi/hr
.
3:mi/hr
b
6. How many times faster does the space shuttle travel compared to the car?_______________
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