algebra 2 practice item guide april 2012 18 questions
TRANSCRIPT
Algebra 2Practice Item Guide
April 201218 questions
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TECHNOLOGY-ENHANCED ITEM TYPES
TECHNOLOGY-ENHANCED ITEM TYPES
TECHNOLOGY-ENHANCED ITEM TYPES
81
1.
1.
2.
2.
3.
HINT: Graph & compare. (Remember parenthesis!)
3.
4.
HINT: Graph! (Remember parenthesis!)
4.
5.
HINT: Graph! (Remember parenthesis!)
5.
6.
6.
HINT: Stat-Edit (Enter data). Stat-Plot (determine shape). Stat-Calc pick matching regression type.
7.
7.
HINT: Multi-step! N = 968 x-bar = 108 sigma = 11 x = 125
P(z>1.55) = 1 - .9394 (table lookup) = .0606
Final answer is probability times #data points = 968 * .0606 = 58.66
125 1081.545
11z
8.
8.
HINT: Distributive – you distributed Commutative – you Changed Order Associative – you associated the middle # with the last #
9.
47
9.
HINT: Use logic! a1 = 8 a2 = 2(8) + 5 = 21 a3 = 2(21) + 5 = 47
10.
10.
HINT: Find graph with same y-value (range!). Graph & compare!
11.
11.
HINT: Think of the question as: Describe the x-values (intervals) where the graph is going up. Then just graph and look!
12.
12.
HINT: Graph and look! Think “HOY VUX”. Horizontal (HOY): y = 4 Vertical (VUX): x = 3
13.
13.
HINT: Committees = Combinations! 3C1 * 7C2 = 63
14.
14.
HINT: Same logic as #11. Think of the question as: Describe the x-values (intervals) where the graph is going up. Then just graph and look!
15.
15.HINT: Must find the % of data first. 23750/50000 = .475 = 47.5% Empirical rule: Pick the 2 sections to the right (or left) of the mean.
16.
16.
HINT: Zeros = x-intercepts! Graph. 2nd Calc zero x = 2.5
17.
17.
HINT: Graph!
18.
18.
HINT: Substitute. 5x -4(x2-x-6) – 11 = 0 Distribute, factor, set factors to zero. OR graph y = 5x -4(x2-x-6) – 11 and find x-intercepts once you are already equal to zero!