Exam 20: Reading, Understanding, and Creating Graphs

A positive relationship represents a situation where an increase in one variable is associated with an increase in the other variable. Draw three graphs that represent a positive relationship.

A relationship showing that exam grades are positively related to hours of study can be described by a curve that

Exhibit 2A-4 -Refer to Exhibit 2A-4. The slope of the relationship between X and Y is

Exhibit 2A-6 -Exhibit 2A-6 shows the relationship between the price of sodas and the quantities that two families are willing to buy. Suppose that both families are willing to buy more sodas while the soda price remain constant. Which of the following is correct?

Exhibit 2A-5 -Refer to Exhibit 2A-5. The movement from C to B is called a

Suppose the value of one variable rises while the value of another variable falls; then the slope of the relationship between the two variables is between 0 and 1.

Explain the purpose of each of the following types of graphs: (A)Time-series graph (B)Scatter plot (C)Pie chart

Refer to the table below. Analyze the data on the number of meals served at small and large restaurants. The number of meals served will vary with the number of cooks employed at the restaurant. (A)Show the relationship between cooks and meals served by graphing two curves with cooks on the horizontal axis and the number of meals on the vertical axis. How do the slopes of the curves change as more cooks are employed? (B)Is the change in the number of cooks a shift in the curve or a movement along the curve? (C)Is the change in the size of the restaurant a shift in the curve or a movement along the curve?

Consider a straight line with a slope of +1 that intersects the origin. It dissects the positive X-Y quadrant. Select any point on the line. What must be true about the distance between the origin and the X coordinate and between the origin and the Y coordinate?

Exhibit 2A-3 -In Exhibit 2A-3, the curve shows

The slope of an inverse relationship

Suppose a curve shows that every time family income increases by $1, spending increases by $.75. If spending increases by $500, then income increased by

Exhibit 2A-1 -According to Exhibit 2A-1, in 2008 the

Exhibit 2A-5 -According to Exhibit 2A-5, the slope of line 1 may be 1.25, whereas the slope of line 2 may be .75.

Exhibit 2A-4 -The curve in Exhibit 2A-4 represents a(n)