# lesson30outline - MA 153 RLesson 30 Outline Quiz...

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MA 153 RLesson 30 Outline Quiz Solutions (Practice problems for distance learning students)1. Find all the values that would be included on the top of the sign chart for: ()()
2. Solve the inequality (a sign chart has been started for you):
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Answering of homework questions over lesson 29. Lesson 30 Section 4.6 Variationk=constant of proportionality (1) "y varies directly as x" or "y is directly proportional to x" =ykx(2) "y varies inversely as x" or "y is inversely proportional to x" kyx=
Example: Express as a formula and find : kyvaries directly as the square root of . If x4,then 32xy==. Example: qis directly proportional to the product of and and inversely proportional to the square of t. xs(a) Express in terms of q,,, and x s tk. (b) If , then 2,3,and 10xst== −=6q= −. Find qwhen 1,4,and 3xst===.
Page 270: #16 The intensity of illumination, I, from a source of light varies inversely as the square of the distance,
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