Taxicab fares. In New York City, taxicabs change passengers $2.50 for entering a cab and then $050 for each one-fifth of a mile (or fraction thereof) traveled. (There are additional charge for slow traffic and idle times, but these are not considered in this problem.) If x presents the distance traveled in miles, then C ( x ) is the cost of the taxi fare, where C ( x ) = $ 2.50 , if x = 0 , C ( x ) = $ 3.00 , if 0 < x ≤ 0.2 , C ( x ) = $ 3.50 , if 0.2 < x ≤ 0.4 , C ( x ) = $ 4.00 , if 0.4 < x ≤ 0.6 , and so on. The graph of C is show below. (Source; New York City Taxi and Limousine Commission.) Using the graph of the taxicab fare function, find each of the following limits. if it exists. lim x → 0.2 − C ( x ) , lim x → 0.2 + C ( x ) , lim x → 0.2 C ( x )
Taxicab fares. In New York City, taxicabs change passengers $2.50 for entering a cab and then $050 for each one-fifth of a mile (or fraction thereof) traveled. (There are additional charge for slow traffic and idle times, but these are not considered in this problem.) If x presents the distance traveled in miles, then C ( x ) is the cost of the taxi fare, where C ( x ) = $ 2.50 , if x = 0 , C ( x ) = $ 3.00 , if 0 < x ≤ 0.2 , C ( x ) = $ 3.50 , if 0.2 < x ≤ 0.4 , C ( x ) = $ 4.00 , if 0.4 < x ≤ 0.6 , and so on. The graph of C is show below. (Source; New York City Taxi and Limousine Commission.) Using the graph of the taxicab fare function, find each of the following limits. if it exists. lim x → 0.2 − C ( x ) , lim x → 0.2 + C ( x ) , lim x → 0.2 C ( x )
Solution Summary: The author analyzes the taxicab fare function in New York City.
Taxicab fares. In New York City, taxicabs change passengers $2.50 for entering a cab and then $050 for each one-fifth of a mile (or fraction thereof) traveled. (There are additional charge for slow traffic and idle times, but these are not considered in this problem.) If x presents the distance traveled in miles, then
C
(
x
)
is the cost of the taxi fare, where
C
(
x
)
=
$
2.50
,
if
x
=
0
,
C
(
x
)
=
$
3.00
,
if
0
<
x
≤
0.2
,
C
(
x
)
=
$
3.50
,
if
0.2
<
x
≤
0.4
,
C
(
x
)
=
$
4.00
,
if
0.4
<
x
≤
0.6
,
and so on. The graph of C is show below. (Source; New York City Taxi and Limousine Commission.)
Using the graph of the taxicab fare function, find each of the following limits. if it exists.
lim
x
→
0.2
−
C
(
x
)
,
lim
x
→
0.2
+
C
(
x
)
,
lim
x
→
0.2
C
(
x
)
Consider the function f(x) = x²-1.
(a) Find the instantaneous rate of change of f(x) at x=1 using the definition of the derivative.
Show all your steps clearly.
(b) Sketch the graph of f(x) around x = 1. Draw the secant line passing through the points on the
graph where x 1 and x->
1+h (for a small positive value of h, illustrate conceptually). Then,
draw the tangent line to the graph at x=1. Explain how the slope of the tangent line relates to the
value you found in part (a).
(c) In a few sentences, explain what the instantaneous rate of change of f(x) at x = 1 represents in
the context of the graph of f(x). How does the rate of change of this function vary at different
points?
1. The graph of ƒ is given. Use the graph to evaluate each of the following values. If a value does not exist,
state that fact.
и
(a) f'(-5)
(b) f'(-3)
(c) f'(0)
(d) f'(5)
2. Find an equation of the tangent line to the graph of y = g(x) at x = 5 if g(5) = −3 and g'(5)
=
4.
-
3. If an equation of the tangent line to the graph of y = f(x) at the point where x 2 is y = 4x — 5, find ƒ(2)
and f'(2).
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