make sure the tutor shows the graph work and show the work for all. exercise and don't miss any exercise.
Evaluate: 14) 2x + 7y = −4; (2, −5) 16) −3x − 2y = −15; (7, −3) 19) y = −7; (9, −7) *** Complete the ordered pair for each equation. 22) y = −2x + 3; (6, ) 24) −x + 10y = 8; ( , 2/3 ) 28) y = −5x + 1 x y 0 1 2 −1 32). 2x − y = 12 x y 0 0 −2 Plot ordered pairs on the graph. 44) (−2, −3) 45) (4, −5) 46) (−5, 0) 4.2 ANSWERS TO TECHNOLOGY EXERCISES 6. (7, 0), (0, −3) 8. −x + 5y = 10 x y 0 0 4 −3 14) y = −x + 3 19) 2x − y = 8 39). The cost of downloading popular songs from iTunes is given by y = 1.29x, where xrepresents the number of songs downloaded and y represents the cost, in dollars. 1. Make a table of values using x = 0, 4, 7, and 12, and write the information as ordered pairs. 1. Explain the meaning of each ordered pair in the context of the problem. 1. Graph the equation. Use an appropriate scale. 1. How many songs could you download for $11.61? 4.3 1. Use the slope formula to find the slope of the line containing each pair of points. 22) (0, 3) and (9, 6) 28). (2, 0) and (−5, 4) 32. (1, 3) and (1, −1) 47 Graph the line containing the given point and with the given slope. (2, 1) m = ¾ Use the slope and one point on a line graph the line. 3. ( 1 , 2 ) m = 1/3 1. (−1, −2); m = 0 1. (2, 0); slope is undefined. 4.4 Each of the following equations is in slope-intercept form. Identify the slope and the y-intercept, then graph each line using this information. Put each equation into slope-intercept form, if possible, and graph. 18). x + 2y = −8 20) 2x − 5y = 5 Write the slope-intercept form for the equation of a line with the given slope and y-intercept. 33) m = −4; y-int: (0, 7) 1. m = −7; y-int: (0, 4) Determine whether each pair of lines is parallel, perpendicular, or neither. 50) 52) 62)