Exam 1: Functions and Their Graphs

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Find the center and radius of the circle, and sketch its graph. (x12)2+(y12)2=494\left( x - \frac { 1 } { 2 } \right) ^ { 2 } + \left( y - \frac { 1 } { 2 } \right) ^ { 2 } = \frac { 49 } { 4 }

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Select the correct graph, showing f and g are inverse functions. f(x)=6x+1,g(x)=x16f ( x ) = 6 x + 1 , g ( x ) = \frac { x - 1 } { 6 }

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A discount outlet is offering a 70% discount on all items.Select a linear equation giving the sale price S for an item with a list price L.

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Find a mathematical model representing the statement.(Determine the constant of proportionality.) Y varies inversely as x. (y=9 when x=45.)( y = 9 \text { when } x = 45 . )

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Identify the parent function and the transformation shown in the graph.Write an equation for the function shown in the graph. Identify the parent function and the transformation shown in the graph.Write an equation for the function shown in the graph.

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Identify the parent function and the transformation shown in the graph.Write an equation for the function shown in the graph. Identify the parent function and the transformation shown in the graph.Write an equation for the function shown in the graph.

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Find ( fg )(x). f(x)=3xg(x)=5x+7f ( x ) = \sqrt { 3 x } \quad g ( x ) = \sqrt { 5 x + 7 }

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Evaluate the indicated function for f(x)=x2+6f ( x ) = x ^ { 2 } + 6 and g(x)=x5g ( x ) = x - 5 . (f/g)(4)g(6)( f / g ) ( - 4 ) - g ( 6 )

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Find fgf \circ g and the domain of the composite function. f(x)=x,g(x)=x+3f ( x ) = | x | , g ( x ) = x + 3

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Approximate the coordinates of the points. Approximate the coordinates of the points.

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Find the slope-intercept form of the equation of the line passing through the points.Select the correct answer for the line. P(6,2),Q(6,6)P ( 6 , - 2 ) , Q ( - 6,6 )

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Write the standard form of the equation of the circle with the given characteristics. center: (-1, -5); radius: 6

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Let M denote the midpoint of the line segment joining (4, 3) and (11, 6).Find the distance from M to the point (-6, -5).Round the answer to the nearest tenth. ​

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Does the function have an inverse function? Does the function have an inverse function?

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Find the distance between the points. ​ (-9, 4), (3, -5) ​

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The number of people playing tennis T (in millions) in the United States from 2000 through 2007 can be approximated by the function T(t)=0.0235t40.3401t3+2.556t26.86t+23.8T ( t ) = 0.0235 t ^ { 4 } - 0.3401 t ^ { 3 } + 2.556 t ^ { 2 } - 6.86 t + 23.8 And the U.S.population P (in millions) from 2000 through 2007 can be approximated by the function P(t)=5.8t+224.5P ( t ) = 5.8 t + 224.5 , where t represents the year, with t = 0 corresponding to 2000. Evaluate the function h(t)=0.0235t40.3401t3+2.556t26.86t+23.85.8t+224.5h ( t ) = \frac { 0.0235 t ^ { 4 } - 0.3401 t ^ { 3 } + 2.556 t ^ { 2 } - 6.86 t + 23.8 } { 5.8 t + 224.5 } for t = 0 and 3.

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Given the points (-6, -8) and (4, -6).Find a third point so that the three points form the vertices of a right triangle. ​

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Find the x- and y-intercepts of the graph of the equation y2=8x+5y ^ { 2 } = 8 x + 5 .

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Find the inverse function of g(x) = x2 - 3 informally.

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The monthly cost C of running the machinery in a factory for t hours is given by C(t)=40t+400C ( t ) = 40 t + 400 The number of hours t needed to produce x products is given by t(x)=6xt ( x ) = 6 x . Find the equation representing the cost C of manufacturing x products.

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