Sometimes questions that involve graphs will ask you to consider the effect of a changing factor or factors. Problem statement: → The line labeled D1 in the graph to the right shows the number of cups of lemonade that Caroline and Emily can sell at their lemonade stand at various prices. Caroline and Emily have noticed that they sell more lemonade when it's hotter. Click anywhere on the graph to open a window with a control labeled Temperature. If you use the slider to change the temperature, the line will shift. Change the temperature from 80 degrees to 70 degrees. Question: → At a price of $0.50, how many more or fewer cups of lemonade do Caroline and Emily sell when the temperature is 70 degrees than when the temperature is 80 degrees? (Note: indicate the change in cups of lemonade sold: fewer will be a negative number and more will be a positive number) A. −5 B. 0

Consider the following geometry problems in 3-space enter t or f depending on whether the statement is true or false. (you must enter t or f -- true and false will not work.) f equation editorequation editor 1. a plane and a line either intersect or are parallel t equation editorequation editor 2. two planes parallel to a third plane are parallel f equation editorequation editor 3. two lines either intersect or are parallel f equation editorequation editor 4. two planes orthogonal to a third plane are parallel f equation editorequation editor 5. two planes orthogonal to a line are parallel f equation editorequation editor 6. two planes either intersect or are parallel f equation editorequation editor 7. two lines orthogonal to a third line are parallel t equation editorequation editor 8. two lines parallel to a third line are parallel t equation editorequation editor 9. two planes parallel to a line are parallel f equation editorequation editor 10. two lines parallel to a plane are parallel f equation editorequation editor 11. two lines orthogonal to a plane are parallel