Use the indicated x-values on the graph of 
to find the x-coordinate of any horizontal point of inflection.
A. a
B. c
C. f
D. e
E. d
Answer: D
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Write the equation of the line with the given slope and y-intercept.slope - 
;y-intercept (0, 7)
A. y = - 
x + 7
B. y = 
x + 7
C. y = - 
x - 7
D. y = 
x - 7
Determine whether the formula determines y as a function of x.y = 9x + 1
A. Yes B. No
Find the domain of the function.
?
?
A. Non-negative real numbers x B. All real numbers x C. All real numbers x such that x> -4 D. Non-negative real numbers x except x =4 E. All real numbers x such that x< 4
Find the equilibrium point (x,p) of the demand and supply equations. The equilibrium point is the price p and number of units x that satisfy both the demand and supply equations.
?
Demand Supply 
?
A. (250, 445)?
B. ??(445, -250)?
C. ?(445, 250)?
D. ?(-250, 445)?
E. ?(-250, -445)?