Interpreting Linear Models
Pre-Algebra · Flashcards
PRE-ALGEBRA · FLASHCARDS
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QUESTION
In the model
d
=
60
t
d = 60t
d
=
60
t
,
d
d
d
is distance in miles and
t
t
t
is time in hours. What are the units of the slope 60?
QUESTION
A car's value is modeled by
V
=
−
0.8
t
+
24
V = -0.8t + 24
V
=
−
0.8
t
+
24
, in thousands of dollars, where
t
t
t
is age in years. What does
−
0.8
-0.8
−
0.8
mean?
QUESTION
In a linear model
y
=
m
x
+
b
y = mx + b
y
=
m
x
+
b
, what does
b
b
b
represent in context?
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ANSWER
The initial value: the value of
y
y
y
when
x
=
0
x = 0
x
=
0
.
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