Study Guide and Intervention (continued) Analyzing Functions with Successive Differences and Ratios 9-6 Write Equations Once you find the model that best describes the data, you can write an equation for the function. Basic Forms Linear Function y = mx + b Quadratic Function y = ax 2 Exponential Function y = ab

9-5 Study Guide and Intervention (continued) Solving Quadratic Equations by Using the Quadratic Formula The Discriminant in the Quadratic Formula, x = ^ ~ "^""^ > expression under the radical sign, b'^ - 4ac, is called the discriminant. The discriminant can be used to determine the number of real solution s for a quadratic equation. A dilation changes the shape of a figure. d. The image of a figure under a dilation lies on the opposite side of the center from the preimage. e. A similarity transformation is a congruence transformation. f. The center of a dilation is its own image. g. A dilation is an isometry. h. The scale factor for a dilation is a positive number. i. 1$0( '$7( 3(5,2' 6wxg *xlgh dqg ,qwhuyhqwlrq frqwlqxhg 'lodwlrqv 'lodwlrqv ,q 7kh &rruglqdwh 3odqh 7r ilqg wkh frruglqdwhv ri dq lpdjh diwhu d glodwlrq fhqwhuhg dw wkh ruljlq pxowlso wkh [ dqg frruglqdwhv ri hdfk srlqw rq 9.6 Geometry - Dilations - Duration: 8 3 Study Guide and Intervention Page 19 continued - Duration: 7-6 Dilations and Similarity in the Coordinate Plane - Duration: The Glencoe Pre-Algebra Parent and Student Study Guide Workbook is designed to help you support, Pre-Algebra Online Study Toolscan help your student succeed. 9 6. 22 7. 17 8. 9 9. 3 10. 4 2 x 11. xy 12. 13. 9-6 Skills Practice Dilations Find the image of each polygon with the given vertices after a dilation centered at the origin with the given scale factor. 1. J(2, 4), K(4, 4), P(3, 2); k = 2 2. D(-2, 0 Classify DilationsA dilation is a transformation in which the image may be a different size than the preimage. A dilation requires a center point and a scale factor, r . Lesson 9-6 Chap