Find the equation of the least-squares regression line. Graph the line and data points on the same graph.
A. y = -150.7 + 6.8x
B. y = 150.7 - 6.8x
C. y = 140.4 - 6.2x
D. y = -140.4 + 6.2x
Answer: C
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Simplify the polynomial by combining like terms: - 7r + 6t - s - 5r + 12s + 4t - t + 5s - r.
a.13r + 16s + 9t b. -13r -16s + 9t c. -13r + 16s + 9t d. -13r -16s -9t
Find the quadratic function that fits the set of data points.(-2, 2), (1, 29), (-6, 50)
A. f(x) = -3x2 + 12x + 2 B. f(x) = 3x2 + 12x + 14 C. f(x) = x2 - 12x + 14 D. f(x) = 3x2 + 2x + 2
Solve the system.
A. x = -3, y = -3, z = 1, w = -2 B. x = 3, y = -3, z = 1, w = -1 C. x = 3, y = -6, z = -1, w = -1 D. x = 1, y = -1, z = 3, w = -2
State whether the line between the two points is increasing, decreasing, horizontal, or vertical.(14, -4) and (9, -4)
A. increasing B. decreasing C. horizontal D. vertical