Chapter 4 Assessment - Linear and Quadratic Functions

Use the slope and y-intercept to graph the linear function. f(x) =5/3x + 3

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Graph the function. State whether it is increasing, decreasing, or constant. f(x) = 5x + 3

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Linda needs to have her car towed. Little Town Auto charges a flat fee of $65 plus $2 per mile towed. Write a function expressing Linda's towing cost, c, in terms of miles towed, x. Find the cost of having a car towed 15 miles.

• A) c(x) = 2x + 65; $85
• B) c(x) = 2x; $30
• C) c(x) = 2x + 65; $95
• D) c(x) = 2x; $67

Graph the function using its vertex, axis of symmetry, and intercepts. f(x) = x^2+ 2x + 1

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Determine, without graphing, whether the given quadratic function has a maximum value or a minimum value and then find that value. f(x) = x^2 - 2x - 9

• maximum; - 10
• minimum; - 10
• minimum; 1
• maximum; 1

Determine the average rate of change for the function. h(x) = -7x - 2

• 7
• 2
• -2
• -7

Graph the function. State whether it is increasing, decreasing, or constant. g(x) = 2x - 4

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To convert a temperature from degrees Celsius to degrees Fahrenheit, you multiply the temperature in degrees Celsius by 1.8 and then add 32 to the result. Express F as a linear function of c.

• F(c) = 1.8 + 32c
• F(c) = 33.8c
• F(c) = (c-32)/1.8
• F(c) = 1.8c + 32

Plot a scatter diagram.

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Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.

• y = 6.8x - 150.7
• y = -6.2x + 140.4
• y = -6.8x + 150.7
• y = 6.2x - 140.4