Solve the problem.Find the least squares line through the points 
and 
A. y = -21x + 6
B. y = -27x - 58
C. y = -27x + 6
D. y = -21x - 58
Answer: A
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Decide whether or not the fractions are equivalent.- 
and - 
A. Not equivalent B. Equivalent
Using the addition/subtraction method, find the value of x and y to satisfy the following equations: x + 2y = 4; 2x - 3y = 7
a. x = 15 y = 7/2 b. x = 60 y = 15 c. x = 7/13 y = 7/2 d. x = 31/7 y = 2/7 e. x = 26/7 y = 1/7
Solve the problem.Suppose that in a certain city, the Democratic, Republican, and Independent parties always nominate candidates for mayor. It turns out that the percent of people voting for each party candidate in the next election depends on the percent that voted for that party in the last election. The percent voting for each party in the next election is given by 
= 
,where d, r, and i are the respective percents (in decimals) that voted for that party in the last
election. If the percent voting for a Democrat in the next election is 41%, the percent voting for a Republican in the next election is 42%, and the percent voting for the Independent party in the next election is 17%, then what percent of people voted for an Independent in the last election? A. 40% B. 25% C. 10% D. 50%
Solve.Devon received a birthday check for $40.00 from his aunt. He immediately cashed the check and went on a shopping spree. In three different stores he spent $11.21, $11.25, and $6.24, respectively. How much was left of the birthday money after these purchases?
A. $11.30 B. $11.60 C. $28.70 D. $12.30