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.
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