Orion TI-
30XS MultiView™ User’s Guide - User guide
Version 1.0
Orbit Research
Confidential and Proprietary Information
34
Change Anthony's last score from 11 to 15.
data, down arrow, down arrow, down arrow
,
15
,
down
arrow
Result = L1(5)=
2nd, [stat]
,
1
,
down arrow, down arrow, enter
Result = 1-Var: L1, L2
1:
If the teacher adds 4 points to Test 4, Anthony's average grade is 12.
Problem
The table below gives the results of a braking test.
Test No.
1
2
3
4
Speed (kph)
33
49
65
79
Braking distance (m) 5.30 14.45 20.21 38.45
Use the relationship between speed and braking distance to estimate the braking
distance required for a vehicle traveling at 55 kph.
A hand-drawn scatter plot of these data points suggest a linear relationship. The
TI-30XS calculator uses the least squares method to find the line of best fit,
y′
=
ax′
+
b
, for data entered in lists.
data, data
,
4
Result = Clear 4:
33
,
down arrow
,
49
,
down arrow
,
65
,
down arrow
,
79
,
down arrow, right arrow
,
5.3
,
down arrow
,
14.45
,
down arrow
,
20.21
,
down arrow
,
38.45
,
down
arrow
Result = L2(5)=
2nd, [stat]
,
2
Result = Stats 2:
down arrow, down arrow
Result = Calc
enter
Result = 2-Var: L1, L2 1:
Press
down arrow
to view
a
and
b
.
Result = 2-Var: L1, L2 E
down arrow
This line of best fit, y
′=0.67732519x′-18.66637321 models the linear trend of the
data.
Press
down arrow
until y′ is highlighted.
Result = 2-Var: L1, L2 H
down arrow
enter
,
55
,
), enter
Result = 18.58651222
The linear model gives an estimated braking distance of 18.59 meters for a
vehicle traveling at 55 kph.
