Metro Department Store's annual sales (in millions of dollars) during the past 5yr were

Annual Sales, $\boldsymbol{y}$	$5.8$	$6.2$	$7.2$	$8.4$	$9.0$
Year, $\boldsymbol{x}$	1	2	3	4	5

Draw a straight line L through the points corresponding to the first and fifth years.

Driver error can be listed as the cause of approximately $54 \%$ of all fatal auto accidents, according to the American Automobile Association. Thirty randomly selected fatal accidents are examined, and it is determined that 14 were caused by driver error. Using $\alpha=0.05$, is the AAA proportion accurate?

A recent survey in the N.Y. Times Almanac indicated that 48.8% of families own stock. A broker wanted to determine if this survey could be valid. He surveyed a random sample of 250 families and found that 142 owned some type of stock. At the 0.05 significance level, can the survey be considered to be accurate?

According to the Centers for Disease Control website, in 2011 at least $18 \%$ of high school students smoked a cigarette. An Introduction to Statistics class in Davies County, KY conducted a hypothesis test at the local high school (a medium sized-approximately 1,200 students-small city demographic) to determine if the local high school's percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the 150 students surveyed, 82 have smoked. Use a significance level of $0.05$ and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions.

Is there a difference between the statements “The slope of a straight line is zero” and “The slope of a straight line does not exist (is not defined)”? Explain your answer.

Suppose a and b are real numbers other than zero and that a>b. State whether the inequality is true or false for all real numbers a and b. $a^{3}>b^{3}$

Perform the indicated operations and/or simplify the expression.

$$\left( 3 x ^ { 2 } + 5 x y + 2 y \right) + \left( 4 - 3 x y - 2 x ^ { 2 } \right)$$

Metro Department Store’s annual sales (in millions of dollars) during the past 5 years were

$$\begin{array}{lccccc} \hline \text { Annual Sales, } y & 5.8 & 6.2 & 7.2 & 8.4 & 9.0 \\ \hline \text { Year, } x & 1 & 2 & 3 & 4 & 5 \\ \hline \end{array}$$

Plot the annual sales (y) versus the year (x).

Suppose a and b are real numbers other than zero and that a>b. State whether the inequality is true or false for all real numbers a and b. $\frac{1}{a}>\frac{1}{b}$

Perform the indicated operations and/or simplify the expression.

$$\left( 7 x ^ { 2 } - 2 x + 5 \right) + \left( 2 x ^ { 2 } + 5 x - 4 \right)$$

Since the founding of the Equal Employment Opportunity Commission and the passage of equal-pay laws, the gulf between men’s and women’s earnings has continued to close gradually. At the beginning of 1990 (t=0), women’s wages were 68% of men’s wages, and by the beginning of 2000 (t=0), women’s wages were projected to be 80% of men’s wages. If this gap between women’s and men’s wages continued to narrow linearly, what percentage of men’s wages are women’s wages expected to be at the beginning of 2008?

Suppose a and b are real numbers other than zero and that a>b. State whether the inequality is true or false for all real numbers a and b. $a^{2}>b^{2}$

The equation $W=3.51 L-192$, expressing the relationship between the length L (in feet) and the expected weight W (in British tons) of adult blue whales, was adopted in the late 1960s by the International Whaling Commission.

ketch the straight line that represents the equation.

Rationalize the numerator.

$$\frac { \sqrt [ 3 ] { x ^ { 2 } y } } { 2 x }$$