Find the equation of the least squares line.Two separate tests are designed to measure a student's ability to solve problems. Several students are randomly selected to take both tests and the results are shown below. 
A. y = -0.930 + 19.4x
B. y = 0.930 - 19.4x
C. y = -19.4 - 0.930x
D. y = 19.4 + 0.930x
Answer: D
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Find the equation of the circle that satisfies the following conditions. Express the final equation in the form x2 + y2 + Dx + Ey + F = 0.Center at (0, –5) and r = 6
A. x2 + y2 - 10y - 61 = 0 B. x2 + y2 - 10y + 25 = 0 C. x2 + y2 + 10y - 11 = 0 D. x2 + y2 + 10y + 25 = 0
Provide an appropriate response. A two-liter cola costs $1.19 and 6 cans each containing 16 oz cost $1.59. Which is the better buy and by how much?
A. The 6 cans of cola cost $0.04 less per liter than the two-liter cola. B. The 6 cans of cola cost $0.002 less per ounce than the two-liter cola. C. The two-liter cola costs $0.01 less per liter than the 6 cans of cola. D. The two-liter cola costs $0.20 cents less than the 6 cans of cola.
Solve the equation by expressing each side as a power of the same base and then equating exponents.8(x - 10)/6 = 
A. 
B. {13}
C. {22}
D. {16}
Find the domain of the rational expression.
A. {x|x is a real number and x ? 7} B. {x|x is a real number} C. {x|x is a real number and x ? 3} D. {x|x is a real number and x ? 3 and x ? 7}