Solve by graphing.The cost y (in hundreds of dollars) of tuition at one community college is given by the linear equation 
where x is the number of credits for which a student registers. Graph the equation and use the graph to estimate the cost of tuition if a student registers for 15 credits. 
A. $2900
B. $2100
C. $3300
D. $2175
Answer: D
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Solve the application and answer with a complete sentence.Together, JoAnne and Josh drove 753 miles to take the family on a vacation. Josh drove 102 miles more than twice the number of miles that JoAnne drove. How many miles did each of them drive?
A. JoAnne drove 434 miles and Josh drove 319 miles. B. JoAnne drove 319 miles and Josh drove 434 miles. C. JoAnne drove 167 miles and Josh drove 586 miles. D. JoAnne drove 217 miles and Josh drove 536 miles.
Find a formula for the inverse of the function described below.An organization determines that the cost per person of chartering a bus is given by the formula 
where x is the number of people in the group, and C(x) is in dollars.
A. C-1(x) = 
B. C-1(x) = 
C. C-1(x) = 
D. C-1(x) = 
Find the requested function value.Find (g ? f)(13) when f(x) = 
and g(x) = 3x + 1.
A. 200
B. 20
C. 
D. 16
Solve the problem.A cross-country skier reaches the 10-km mark of a race 40 min after reaching the 
mark. Find the speed (average rate of change) of the skier.
A. 7 km/hr
B. 
km/hr
C. 
km/hr
D. 15 km/hr