CourseHeroprac

# CourseHeroprac - Name:Sample QuizScore Directions:This is a...

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Name: Sample Quiz Score: Directions: This is a sample of what the questions might look like on your upcoming quiz. This is almost certainly longer than the actual quiz, but re ects the type of questions that might appear. 1. Consider the equations and graphs below. Match the equations with the graphs. A. 4x 2 + 4x 2 B. 4x 2 4x 2 C. 4x 2 4x + 2 D. 4x 2 + 4x + 2 The rst two open up. fi For 4x 2 + 4x 2 the vertex is at x = 4 2 ·4 = 1 2 . For x 2 4x + 2 the vertex is at x = 1 2 . The second two open down, for 4x 2 4x + 2 the vertex is at x = ( 4) 2 · 4 = 1 2 , for 4x + 4x + 2 the vertex is at x = 1 2 . This allows you to identify the graphs. 2. Find the equation of the line parallel to y = 3x + 4 through (1, 1). The slope is m = 3, so y ( 1) + 3(x 1) means y = 3x 4. 3. Find the equation of the line perpendicular to y = 3x + 4 through (1, 1). Here m = 1 3 : y + 1 =

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1 3 (x 1) or y = 1 3 x 2 3 .
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