Which one of the following statements expresses a true proportion?
a. 14 : 6 = 28 : 18
b. 3 : 5 = 12 : 20
c. 42 : 7 = 6 : 2
d. 2 : 3 = 3 : 2

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The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

What is the equation of the line graphed?