1. The slope of a line is defined as a change in the y variable divided by the corresponding change in the x variable.
True
False

2. Ceteris paribus means that when we draw a graph showing a relationship between two economic variables, we are holding all other things constant.
True
False

3. An independent variable is one that changes freely in value.
True
False

4. An inverse relationship means that two or more variables move together, as is the case in the typical demand curve.
True
False

5. The vertical line or axis is referred to in economics and mathematics as the x-axis.
True
False

6. A positive or direct relationship is one in which the variables move in the opposite direction, as in the typical supply curve.
True
False

7. The horizontal line or axis is referred to in economics and mathematics as the y-axis.
True
False

8. In economics, it is conventional to put dollar values on the y-axis.
True
False

9. To say that (x,y) = (7,8) is to identify a pair of coordinates for a graph, meaning that the x value is specified first, and then the y value.
True
False

10. The origin of any graph is point 0 on both axes.
True
False

11. The run in a slope calculation refers to movement in a vertical direction.
True
False

12. If y = 7x, then y is 28 when x is -4.
True
False

13. A direct relationship involves a dependent variable moving in the same direction as an independent variable. Such is the case in the typical demand curve.
True
False

14. A graph is a powerful visual representation of how variables relate to each other.
True
False

15. In economics, it is usual to put quantity values on the x-axis.
True
False