Integrated Algebra - June 2011

22 A study showed that a decrease in the cost of carrots led to an increase
in the number of carrots sold. Which statement best describes this relationship?

(1) positive correlation and a causal relationship
(2) negative correlation and a causal relationship
(3) positive correlation and not a causal relationship
(4) negative correlation and not a causal relationship

23 Given: A = {3, 6, 9, 12, 15}
B = {2, 4, 6, 8, 10, 12}

What is the union of sets A and B?

(1) {6}            (3) {2, 3, 4, 8, 9, 10, 15}
(2) {6, 12}       (4) {2, 3, 4, 6, 8, 9, 10, 12, 15}

24 The value of a car purchased for $20,000 decreases at a rate of 12% per year. What will be the value of the car after 3 years?

(1) $12,800.00       (3) $17,600.00
(2) $13,629.44       (4) $28,098.56


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