(a) clearly, a = (5x+15)(31-2x)
(b) I think you can graph a parabola
(c) values for zero area
(d) use what you know about parabolas
(e) ditto
(f) since this is a real-world situation, negative lengths are meaningless. So, D = [-3,31/2]
R = [0,<value at vertex>]
a)Write a function o represent the area of the rectangle.
one side - 5x+15
other side - 31-2x
b) Graph the function- lebel x and yint
c)what dp the x-intercepts represent in this situaltion?
d)Does the funtion have a maximum value in this situaltion? Does it have a minimum value? give max or min value.
e)what information does the vertex give about this situation? Give the vertex.
f)what are the domain and range?
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