Chapter 6 and 7

2. a line that intersects two or more other lines at distinct points
5. a proof that contains an error in reasoning or that contains invalid assumptions
8. the least value of the dependent variable in a relation
11. the ratio of a measurement on a diagram to the corresponding distance measured on the shape or object represented by the diagram
13. consisting of separate or distinct parts.discretevariables represent things that can be counted,such as people in a room
15. two or more 3-d objects that have proportional dimensions
16. a mathematical argument showing that a statement is valid in all cases,or that no counterexample exists
17. the shape of the graph of any quadratic relation
18. a limiting condition of the optimization problem being modelled,represented by a linear inequality
19. root of a quadratic equation that does not to a soulution that satisfies the original problem
20. the set of all possible solutions

1. a normal distribution that has a mean of zero and a standard devation of one
3. a comparison of two amounts that are measured in different units;for example,keying 240 words/8 min
4. a statement assumed to be ture
6. a problem where a quantity must be maximiaed or minimiaed following s set of guidelines or conditions
7. in a function,a value of the variable that makes the value of the function equal to zero
9. the soulution region for a system of linear inequalities that is modelling an optimization problem
10. the defference between a data value and the mean for the same set of data
12. the point at which the quadratic function reaches its maximum or minimum value
14. the region on one side of the gragph of a linear relation on a cartesian plane