 ## True/False Quizzes for Finite Mathematics Topic: Functions and Linear Models (Chapter 1)

Chapter 2 quiz Summary of This Topic
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Everything for Finite Math
Everything for Finite Math & Calculus 1 The graph of any equation in two variables is a straight line. 2 The graph of any linear equation in two variables is a straight line. 3 If f(x) = x2 + 3x, then f( 1) = 4. 4 If f(x) = 2x2 + 1, then f(3) = 37. 5 If f(x) = 2, then f(1) is not defined. 6 Every straight line has a slope. 7 Every line is the graph of a linear equation in two unknowns. 8 To find the equation of a line, all you need is a point and the slope. 9 You need to know the y-intercept to write down the equation of a line. 10 The graph of a quadratic function f(x) = px2+qx+r (with p nonzero) is always a parabola. 11 In a linear cost function, the slope gives the cost of the first item. 12 If displacement is a linear function of time, then the slope of the graph represents the velocity. 13 If y is a linar function of x, then y increases by a fixed amount for each increase of one unit in y. 14 If the weekly sales q of an item priced at \$p are given by q = 3p + 40, then the weekly sales decrease by 3 items for every \$1 increase in price. 15 If the total weekly revenue for items priced at \$p is given by the function R(p) = -p2 + 100p, then the total weekly revenue will be \$100 if we give the items away. 16 A real valued function of a real variable is a rule that assigns a number to each specified number in a specified domain. 17 Some functions assign two or more values to certain numbers in their domains. 18 The regression line associated with two data points (with different x-coordinates) always passes through both points. 19 The regression line associated with three data points (with different x-coordinates) always passes through at least two of those points. 20 The regression line associated with a collection of more than two data points may pass through none of those points. 