Exam 1: Functions and Their Graphs

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Use the given graph of f to select the graph for the following function. y=f(x)y = f ( - x )  Use the given graph of f to select the graph for the following function.    y = f ( - x )

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Use the graph of f(x)=xf ( x ) = | x | to write an equation for the function whose graph is shown.  Use the graph of  f ( x ) = | x |  to write an equation for the function whose graph is shown.

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Graph the function and determine the interval(s) for which f (x) \ge 0. f(x)=x22xf ( x ) = - x ^ { 2 } - 2 x  Graph the function and determine the interval(s) for which f (x)  \ge 0.  f ( x ) = - x ^ { 2 } - 2 x

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Determine whether the function is even, odd, or neither. f(x)=6x3/4f ( x ) = 6 x ^ { 3 / 4 }

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Use the graph of f(x)=x2f ( x ) = x ^ { 2 } to write an equation for the function whose graph is shown.  Use the graph of  f ( x ) = x ^ { 2 }  to write an equation for the function whose graph is shown.

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Show algebraically that f and g are inverse functions. f(x) = 9x + 9 g(x)=x99g ( x ) = \frac { x - 9 } { 9 }

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Find the slope and y-intercept (if possible) of the equation of the line.Select the correct answer for the line. x+3=0x + 3 = 0

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​Find the distance between the points.Round to the nearest hundredth, if necessary. ​ (-8, -8), (-1, 9) ​

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Evaluate f(7) if f(x) = 4x - 1. ​

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Find the slope of the line. ​ Y = 9x + 25 ​

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Tell where the function is decreasing. Tell where the function is decreasing.

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A hospital purchases a new magnetic resonance imaging (MRI) machine for $600,000.The depreciated value y (reduced value)after t years is given by y = 600,000 - 20,000t, 0 ≤ t ≤ 6.Sketch the graph of the equation. ​

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Write the standard form of the equation of the circle tangent to the y-axis and with center (-3, -6).

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Select the correct graph of the given function. f(x)=x2f ( x ) = | x | - 2

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Select the graph of the given function and determine the interval(s) for which f(x) \ge 0. f(x)=(6+x)f ( x ) = - ( 6 + | x | )

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A sub shop purchases a used pizza oven for $885.After 5 years, the oven will have to be replaced.Select the linear equation giving the value V of the equipment during the 5 years it will be in use.

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Find the inverse of the one-to-one function. ​ y = 6x ​ f -1(x) = __________

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Determine the quadrant(s) in which (x, y) is located so that the condition(s) is (are) satisfied. ​ X > 3 and y = 1 ​

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Use the graph, which shows the average retail prices of 1 gallon of whole milk from 1996 through 2007. ​ Use the graph, which shows the average retail prices of 1 gallon of whole milk from 1996 through 2007. ​   ​ Approximate the lowest price of a gallon of whole milk shown in the graph.When did this occur? ​ ​ Approximate the lowest price of a gallon of whole milk shown in the graph.When did this occur? ​

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A mechanic is paid $13.00 per hour for regular time and time-and-a-half for overtime.The weekly wage function is given by W(h)={13h0<h4021(h40)+520h>40W ( h ) = \left\{ \begin{array} { l l } 13 h & 0 < h \leq 40 \\21 ( h - 40 ) + 520 & h > 40\end{array} \right. Where h is the number of hours worked in a week. Evaluate W(30), W(50).

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