Practice [solve the following) 12x9y237 2x+5y=19 2x+3y=12 8x+9y=23 x2y=4 x+y=5 Practice (word problem} 1. Brenda's school is selling tickets to a spring musical. On the first day of ticket sales the school sold 3 senior citizen tickets and 9 child tickets for a total of $75. The school took in $67 on the second day by selling 8 senior citizen tickets and 5 child tickets. What is the price each of one senior citizen ticket and one child ticket? 2. Molly's school is selling tickets to a dance performance. On the first day of ticket sales, the school sold 9 adult tickets and 12 child tickets for a total of $133. The school took in $160 on the second day by selling 12 adult tickets and 4 child tickets. What is the price each of one adult ticket and one child ticket? Week 1 Properties of Graphs The following are useful terminology when analyzing graphs local maximum = 16 f(x) occurs at x = -2 20 Example #1 (-2, 16) Domain: (-4, 0 ) Identify the Key Features 16- Decreasing Range: (-0o, 4] 12 of the Graph Below Increasing Increasing:(-2, 2) . Decreasing: (-4,-2) U(2,00) . Maximum: 4 -5 -4 3 2 -1 ON 1 2 3 4 5 - N W -4+ Absolute or Relative Minimum: -4 -8- Increasing . Absolute or ( Relative -12- X-intercept(s): 0, 3 -16- (2, -16) Is the graph a function? Yes 20- local minimum = -16 occurs at x = 2 Practice Domain: Range: Relative Minimum: Relative Maximum: Intervals of Increase: Decrease: Constant: Domain: Range: Relative Minimum: Relative Maximum: Intervals of Increase: Decrease: Constant