Decide whether the relation is a function.{(-4, 2), (-1, 7), (-1, -1), (-1, 7)}
A. Function
B. Not a function
Answer: B
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Solve each of the following systems of equations. If the system is inconsistent or dependent, say so.x + y = 8x - y = 2
A. (5, 3) B. No solution C. (4, 4) D. (-5, 4)
Subtract.(0.7x4 - 0.8x3 + 0.9) - (4.6x4 + 2.1x - 1.3)
A. -3.9x4 - 0.8x3 - 2.1x + 2.2 B. -3.9x4 - 0.9x3 - 0.4 C. -3.9x4 - 0.8x3 - 2.1x - 0.4 D. -3.9x4 - 0.8x3 + 2.1x + 2.2
Use the graph of a power function and transformations to sketch the graph of the polynomial function.f(x) = - 
x4
A. 
B. 
C. 
D. 
For the graph,a) list the data items, thenb) calculate the mean,c) calculate the standard deviation, andd) calculate the range.If needed, round the standard deviation to 1 decimal place.
A. a) 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 6, 6, 8, 8, 8, 8
b) 
= 4
c) s = 1.8
d) range = 6
B. a) 6, 6, 8, 8, 8, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4
b) 
= 4
c) s = 1.8
d) range = 6
C. a) 6, 6, 8, 8, 8, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4
b) 
= 4
c) s = 2.1
d) range = 6
D. a) 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 6, 6, 8, 8, 8, 8
b) 
= 4
c) s = 2.3
d) range = 6