lesson28outline

lesson28outline - MA 153 Lesson 28 Outline Quiz...

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MA 153 Lesson 28 Outline Quiz Solutions (Practice problems for distance learning students) 1. Find the maximum or minimum value (specify whether it is a max or a min): ( ) 2 2 3 y x = 5 Min value = -5 (It is a min because “a” is positive so parabola opens up and the min/max is the y-coordinate of the vertex. 2. A stone is skipped in the shape of a parabola. During one hop, the stone went a horizontal distance of 6 feet and the maximum height was 4 feet. Find a standard equation of the parabola that fits this information. ( ) 2 y a x h k = + Vertex of our problem is (3,4) so ( ) 2 3 4 y a x = + The point (0,0) is on the parabola, so: ( ) ( ) 2 2 0 0 3 4 4 9 4 9 4 3 4 9 a a a y x = + = = − = − + Answering of homework questions over lesson 27. Lesson 28 Section 2.7 Inequalities using a sign chart
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