2020 QCAA MC General Maths Exam S2P1

Four linear models have been developed for a data set. Identify the residual plot that indicates that the developed linear model is justified.

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When it is 10 a.m. daylight saving time in New South Wales, what time is it in Queensland and South Australia?

• 9:30 a.m. in South Australia and 9 a.m. in Queensland

• 10 a.m. in both Queensland and South Australia

• 10:30 a.m. in South Australia and 10 a.m. in Queensland

• 9 a.m. in South Australia and 8:30 a.m. in Queensland

What is the common difference in the given sequence?

4, 2, 0,-2,-4

• -2

• 2

• 0

• -4

Which of the following graphs could be modelled using a geometric sequence?

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Determine the equation of the least-squares line

• y=16.79x -1146.51

• y=16.79x -18.70

• y=0.05x  -68.33

• y=0.05x+1.70

What is the balance after six months for a loan of ten thousand dollars with interest charged at 6% p/a compounding quarterly, with repayments made quarterly of $700?

• 8600

• 8891.75

• 9450

• 10000

What is the total weight of the minimum spanning tree?

• 10

• 15

• 12

• 14

Choose the best description for the direction and strength of the association of this scatterplot

• Strong negative association

• Weak negative association

• Strong positive association

• Weak positive association

What is the greatest float time for a non-critical activity?

• 0 days

• 1 day

• 3 days

• 2 days

Which of the following is a planar graph with five vertices and four faces?

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