4.1 - 4.3 Quiz College Algebra - Linear and Quadratic Functions

Use the slope and y-intercept to graph the linear function. f(x) = 3x - 1

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Determine the average rate of change for the function. f(x) = 8x - 7

• -8
• 8
• -7
• 7

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

Plot a scatter diagram.

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Identify the scatter diagram of the relation that appears linear.

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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.

• A) y = 1.17x + 16.4
• B) y = 1.03x + 16.4
• C) y = 1.17x + 18.9
• D) y = 1.03x + 18.9

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) = x2 - 2x - 9

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

Graph the function f by starting with the graph of y = and using transformations (shifting, compressing, stretching, and/or reflection). f(x) = x^2 - 2

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