intro Let's study domain and range of a graph. reminder 270 Domain: a set of x values that determines how far left and right the graph goes comment The line goes left forever and right forever. reminder 270 Range: set of y values that determines how far up and down the graph goes prompt 300 60 460 2 10 You know this. Pause the video and record the answer in your study guide. comment 35 5 This parabola extends left forever and right forever. comment 35 Note that (-∞,∞) is the set of all real numbers. Try this one. What is the range of this parabola? (∞,0) (0,∞) [0,∞) (0,∞] [0,∞) prompt 460 10 270 Now go practice some more.