In a certain city there is a river running through the middle of the city. There are four islands and eleven bridges as shown in the figure below.
A graph that appropriately models this situation would have
A. 4 vertices and 11 edges.
B. 11 vertices and 4 edges.
C. 6 vertices and 11 edges.
D. 11 vertices and 6 edges.
E. none of these
Answer: C
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Estimate the value of the quantity.A swimming pool has a leak. The leak is getting worse. The following table gives the leak rate every 6 hours.
Suppose it keeps leaking 6.3 gallons every 6 hours. After losing 3500 gallons the leak is fixed. Approximately how long did the leak last? Use the right endpoints to estimate the first 48 hours.
A. 55.86 hours B. -79.60 hours C. 33.75 hours D. 27.75 hours
Write an equation in slope-intercept form of a line satisfying the set of conditions.Slope - 
; b = 
A. y = - 
x - 
B. y = 
x - 
C. y = 
x + 
D. y = - 
x + 
Identify the vertex, axis of symmetry, and whether the parabola opens upward or downward.
A. (-2, 1); x = -2; Upward B. (-2, 1); x = -2; Downward C. (-2, 1); x = 0; Downward D. (1, -2); x = 0; Upward
Use the point-slope form to write an equation of the line that passes through the given point and satisfies the given condition. Write your final answer in slope-intercept form.Through (5, -4) and parallel to 5x + 2y = 13
A. y = - 
x - 4
B. y = 
x + 
C. y = - 
x + 13
D. y = - 
x + 