1.
Economists design graphs to confuse people.
2.
If the straight line on a two-variable graph slopes downward to the right, then there is a positive relationship between the two variables
3.
A variable that changes as a consequence of a chane in another variable is considered a dependent variable.
4.
Economists always put the independent variable on the horizontal axis and the dependent variable on the vertical axis.
5.
Ceteris paribus means that other variables are changing at the same time.
6.
In the ratio for the calculation of the slope of a straight line, the vertical change is in the numerator and the horizontal change is in the denominator.
7.
If the slope of the linear relationship between consumption and income was.90, then it tells us that for every $1 increase in income there will be a $.90 increase in consumption.
8.
The slope of a vertical line in a two-variable graph will not be affected by by the choice of the units for either variable.
9.
The slope of lines measure marginal change.
10.
Assume in a graph that price is on the vertical axis and quantity is on the horizontal axis. The absence of a relationship between price and quantity would be a straight line parallel to the horizontal axis.
11.
A line with an infinite slope in a two-variable graph is parallel to the horizontal axis.
12.
In a two-variable graph, income is graphed on the vertical axis and the quantity of snow is graphed on the horizontal axis. If income was independent of the quantity of snow, then this independence would be represented by a line parallel to the horizontal axis.
13.
Id a linear equation is y = 10 +5x, the vertical intercept is 5.
14.
When a line is tangent to a nonlinear curve, then it intersects the curve at a particular point.
15.
If the slope of a straight line on a two-variable graph were .5 and the vertical intercept were 5, then a value of 10 for x would mean that y is also 10.
16.
A slope of -4 for a straight line in a two-variable graph indicates the there is an inverse relationship between the two variables.
17.
If x is an independent variable and y is a dependent variable, then a change in y results in a change in x.
18.
An upward slope for a straight line that is tangent to a non linear curve indicates that the slope of the nonlinear curve at that point is positive.
19.
If one pair of x,y points was (13,10), and the other pair was (8, 20), then the slope of the straight line between the two sets of points in the two-variable graph, with x on the horizontal axis and y on the vertical axis, would be 2.
20.
When the value of x is 2, a value of 10 for y would be calulated from a linear equation of y= -2 + 6x.