Indicate whether the function is one-to-one.{(-5, -9), (-4, -9), (-3, 7), (-2, 4)}
A. Yes
B. No
Answer: B
Mathematics
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Solve the problem.Use the line graph to determine how many more hours were needed to prepare for Test 4 than for 
.
A. 1 B. 3 C. 2 D. 4
Mathematics
Solve the problem.Decide which of the rational functions might have the given graph. 
A. f(x) = x + 
B. f(x) = x + 
C. f(x) = x + 2
D. f(x) = 2x + 
Mathematics
Solve for the requested variable.s varies directly as the square of t, and s = 80 when t = 4. Find s when t is 8.
A. s = 160 B. s = 20 C. s = 32 D. s = 320
Mathematics
Use the appropriate sum or difference identity to write the given expression as a function of x alone.sin 
A. -sin x B. sin x C. -cos x D. cos x
Mathematics