Use a graphing calculator to find the vertex.y = x2 - 4
A. (0, 4)
B. (-4, 0)
C. (0, -4)
D. (4, 0)
Answer: C
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Find the exact value of the expression.cos 35° cos 25° - sin 35° sin 25°
A. 
B. 
C. 
D. 
Solve by graphing. Label the axes and show where the solution is located on the graph.In one U.S. town the annual consumption, b, of beef (in kg per person) can be estimated by 
where t is the number of years since 1975. Graph the equation and use the graph to estimate the beef consumption in the year 1986.
A. About 27 kg per person B. About 19 kg per person C. About 16 kg per person D. About 13 kg per person
The graphs of two polynomials p and d are shown in the figure. p is represented by the solid line and d is represented by the dashed line. If f = 
, (a) find the domain of f, (b) find the x-intercepts of f, and (c) sketch the graph of f.
A. (a) (-?, -2) ? (-2, ?)
(b) (-1, 0)
(c) 
B. (a) (-?, 1) ? (1, ?)
(b) (2, 0)
(c) 
C. (a) (-?, -1) ? (-1, ?)
(b) (-2, 0)
(c) 
D. (a) (-?, -1) ? (-1, ?)
(b) (-2, 0)
(c) 
Solve the equation.3x = 81
A. 4 B. 3 C. 5 D. 27