144 Chapter 2 Linear Equations in Two Variables and Functions Concept 5: Horizontal and Vertical Lines For Exercises 49–56, determine if the equation represents a horizontal line or a vertical line.Then graph the line and identify the x- and y-intercepts. (See Examples 8–9.) 49. y 1 50. y 3 5 4 y 3 2 1 543 2 1 1 2 3 4 5 1 2 3 4 5 51. x 2 52. x 5 5 4 y 3 2 1 543 1 2 3 4 5 2 1 5 4 y 3 2 1 1 543 1 2 3 4 5 2 3 4 5 53. 2x 6 5 54. 3x 12 5 4 y 3 2 1 543 1 2 3 4 5 2 1 1 2 3 4 5 x x x 5 4 y 3 2 1 543 2 1 1 2 3 4 5 1 2 3 4 5 2 1 1 2 3 4 5 5 4 y 1 543 1 2 3 4 5 2 1 2 3 4 5 55. 2y 1 9 56. 5y 10 x x x 3 2 1 5 4 y 1 543 1 2 3 4 5 2 1 2 3 4 5 x 3 2 1 5 4 y 1 543 1 2 3 4 5 2 1 2 3 4 5 x 3 2 1 57. Explain why not every line has both an x-intercept and a y-intercept. 58. Is it possible for a line to have no x-intercept and no y-intercept? 59. Which of the lines defined here has only one unique intercept? a. 2x 3y 8 b. x 7 c. 3y 9 d. x y 0
miller_intermediate_algebra_4e_ch1_3
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