Section 3.4 Slope-Intercept Form of a Linear Equation 257 For Exercises 39–44, match the equation with the graph (a–f) by identifying if the slope is positive or negative and if the y-intercept is positive, negative, or zero. 39. b 40. d 41. e y 13 y 2x 3 y 3x 2 x 3 42. y a 43. y x c 44. y 2x f 12 y x x 2 For Exercises 45–56, write each equation in slope-intercept form (if possible) and graph the line. (See Examples 3 and 4.) 45. 2x y 9 46. 6x y 8 47. x 2y 6 48. 5x 2y 2 9 8 7 6 5 543 1 2 3 4 5 5 4 y 1 21 5 4 y 1 2 1 9 8 7 6 5 4 1 49. 2x 4y 6 50. 6x 2y 14 51. x y 0 52. x y 0 5 4 y 1 543 21 1 2 3 4 5 2 3 4 5 x 3 2 1 5 4 y 1 543 21 1 2 3 4 5 2 3 4 5 x 3 2 1 y 6x 8 5 4 y 1 543 21 1 2 3 4 5 2 3 4 5 x 3 2 1 8 7 6 5 4 y 1 543 1 2 3 4 5 21 2 x 3 2 1 4 1 2 1 y x 3 2 1 y 1 2 x 3 y 5 2 y 2x 9 x 1 543 1 2 3 4 5 2 3 4 5 x 3 2 1 543 1 2 3 4 5 2 3 4 5 x 3 2 1 543 2 1 1 2 3 4 5 y x 3 2 1 y 1 2 x 3 2 y 3x 7 y x y x Writing Translating Expression Geometry Scientific Calculator Video y x y x y x y x y x a. b. c. d. e. f.
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