The rational function f(x) = 
models the cost, f(x), in dollars, to produce x bobble-head figures. The graph is show. Use the equation to solve the problem. 
Find and interpret f(40).
A. 5; It costs $5 to produce 40 bobble-head figures.
B. 405; It costs $405 to produce 40 bobble-head figures.
C. 15; It costs $15 to produce 40 bobble-head figures.
D. 600; It costs $600 to produce 40 bobble-head figures.
Answer: C
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If f satisfies the equation of change 
, then what can be said about the function 
?
?
A. f is linear with slope 4.
B. f is linear with slope 
.
C. f is exponential with growth factor 4.
D. f is exponential with growth factor 
.
Evaluate the logarithm without the use of a calculator.log7
A. 7
B. 
C. 1
D. 
Find the slope-intercept form of the line satisfying the given conditions.
A. y = 8x + 19 B. y = 4x + 3 C. y = -8x + 19 D. y = -4x + 3
Use the discriminant to determine the number of real solutions.x2 + 3x + 4 = 0
A. One real solution B. No real solutions C. Two real solutions