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hendricks_beginning_algebra_1e_ch1_3

Section 3.2 Graphing Linear Equations 225 d. What will be the depreciated value of the limousine when it is 3 yr old? e. Use the information obtained in parts (a) to (c) to graph the equation. You Be the Teacher! Answer each student’s question. 97. What is the minimum number of points that you must find to graph a straight line? Why? 98. For the equation y = 3 7 x + 4, how can I choose x-values to plug into the equation so that I get integer values for y? 99. How do you find the x-intercept of the equation x = 7? 100. How do you find the y-intercept of the equation y = -10? 101. I am trying to graph the equation 4y + x = 0. When I find the intercepts, I can only find one point (0, 0). How can I find another point to graph the equation? 102. I am trying to graph the equation 3x - 5y = 15. When I find the intercepts, I only get one point (5, -3). How can I find another point to graph the equation? Calculate It! Use a graphing calculator to complete each exercise. 103. Draw, by hand, the coordinate system that is defined by these window settings. Label the x-axis and y-axis with the appropriate tick marks. 104. Draw, by hand, the coordinate system that is defined by these window settings. Label the x-axis and y-axis with appropriate tick marks. 105. Determine the ordered pairs for the x-intercept and y-intercept of the graph if each tick mark represents one unit. 106. Determine the ordered pairs for the x-intercept and y-intercept of the graph if each tick mark on the x-axis represents one unit and each tick mark on the y-axis represents five units. 107. Graph y = -2x + 20 in the standard viewing window. a. Sketch the graph shown on your calculator. b. Which intercept(s) can be seen on your calculator? c. Find the x-intercept and y-intercept by hand. d. What viewing window will show the complete graph that contains both intercepts? State the values that you would use for Xmin, Xmax, Xscl, Ymin, Ymax, and Yscl. e. Sketch the graph shown on your calculator using the window settings from part d. 108. Graph y = 0.5x + 40 in the standard viewing window. a. Sketch the graph that is shown on your calculator. b. Which intercept(s) can be seen on your calculator? c. Find the x and y-intercepts by hand. d. What viewing window will show the complete graph that contains both intercepts? State the values you would use for Xmin, Xmax, Xscl, Ymin, Ymax, and Yscl. e. Sketch the graph shown on your calculator using the window settings from part d. Think About It! 109. Make a table of solutions for the equation y = 2x + 4. Use x-values of -2, -1, 0, 1, 2, and 3. Do you notice anything about how the y-values are changing in the table? How does this relate to the equation? 110. Make a table of solutions for the equation y = -3x + 1. Use x-values of -2, -1, 0, 1, 2, and 3. Do you notice anything about how the y-values are changing in the table? How does this relate to the equation?


hendricks_beginning_algebra_1e_ch1_3
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