Provide an appropriate response.Why is the slope of a vertical line undefined?
What will be an ideal response?
Answers may vary. One possibility: Let (a, b) and (a, c), b ? c, be any two different points on a vertical line. The slope of the line = 
= 
= 
. Division by zero is undefined.
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Solve the problem.The accompanying figure shows the graph of y = -x2 shifted to a new position. Write the equation for the new graph.
A. y = -(x + 4)2 B. y = -x2 - 4 C. y = -(x - 4)2 D. y = -x2 + 4
Graph the function.y = 
tan x
A. 
B. 
C. 
D. 
Solve the problem.Graph f(t) = csc t in [-2?, 2?, ?/2] by [-4, 4, 1] using dot mode. Use the graph to identify the domain and period of f.
A. t ? ?n, where n is an integer; 2?
B. t ? ?n, where n is an integer; ?
C. t ? 
+ ?n, where n is an integer; 2?
D. t ? 
+ ?n, where n is an integer; ?
Provide an appropriate response.90 days from October 19 is:
A. January 19 B. January 16 C. January 17 D. January 18