Part A) Y cannot be described as a function of x, because in order to be a function, there can only be one input, the x value, for every output, f(x) or the y value. Since the x value, 16, generates two y values, -2 and 2, this cannot be called a function.
Part B)
<span>f(x) = 25x + 16
f(20)= 25(20) + 16
f(20) = 500 + 16
f(20) = 516
This is the total cost, in dollars, of renting the truck for 20 hours. </span>
The digit in the ten millions place of a number that is less than 55,000,000 but greater than 25,000,000 can be 3 or 4.
25,000,000 < <u>3</u>5,000,000 < 55,000,000
25,000,000 < <u>4</u>5,000,000 < 55,000,000
55/8 or 55:8 will be the unit rate I think
The factored inequality is 
<h3>Factoring Inequalities</h3>
The given inequality is:
This can be further simplified as:
The inequality can be re-written as:
Since the question does not state that we should solve the inequality, the simplest we can get after factoring is
Learn more on factoring of inequality here: brainly.com/question/16789297
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