Texas Instruments TI-36X Pro User Manual - Page 44
method to find the line of best fit
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³ Problem The table below gives the results of a braking test. Test No. Speed (kph) Braking distance (m) 1 2 33 49 5.30 14.45 3 65 20.21 4 79 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 calculator uses the least squares method to find the line of best fit, y'=ax'+b, for data entered in lists. v v $ $ $ < 33 $ 49 $ 65 $ 79 $ " 5.3 $ 14.45 $ 20.21 $ 38.45 < %s %u 3 (Selects 2-Var Stats) $ $ $ < Press $ as necessary to view a and b. 44
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44
³
Problem
The table below gives the results of a braking test.
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 calculator uses the least squares
method to find the line of best fit,
y
'=
ax
'+
b
, for data entered in
lists.
Test No.
1
2
3
4
Speed
(kph)
33
49
65
79
Braking
distance
(m)
5.30
14.45
20.21
38.45
v
v
$
$
$
<
33
$
49
$
65
$
79
$
"
5.3
$
14.45
$
20.21
$
38.45
<
%s
%u
3
(Selects
2-Var Stats
)
$
$ $
<
Press
$
as necessary to view
a
and
b.