Solve the problem.The table below shows the population of a certain city in various years. Use regression (or some other method) to find values for a and b so that 
models the data, where x represents the number of years since 1980 and f(x) represents the population of the city in hundreds of thousands. Round your answers to 5 significant digits.
A. a ? 2.1375, b ? 0.44316
B. a ? 2.6352, b ? 0.47558
C. a ? 1.8506, b ? 0.51209
D. a ? 1.7025, b ? 0.53750
Answer: B
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If Moon 4 has a diameter of 8-14 km or Planet X has four moons, then Moon 1 may have water ice.
A. True B. False
Solve the equation.
+ 
= 
A. 
B. ?
C. 
D. 
Give the domain and range of the relation.
A. domain: (-?, ?); range: (-?, ?) B. domain: (-?, 0) ? (0, ?); range: (-?, -3) ? (-3, ?) C. domain: (-?, 0] ? [0, ?); range: (-?, -3] ? [-3, ?) D. domain: (-?, -3) ? (-3, ?); range: (-?, 0) ? (0, ?)
Factor the trinomial.4x2 + 23x - 35
A. (4x - 40)(4x - 5) B. (x - 7)(4x - 5) C. (x + 7)(4x - 5) D. (5 - 4x)(4x - 5)