Question

A set of weights includes a 5 lb barbell and 4 pairs of weight plates. Each pair of

plates weighs 20 Ib. If x pairs of plates are added to the barbell, the total weight
of the barbell and plates in pounds can be represented by f(x) = 20x+ 5.
What is the range of the function for this situation?
A {0, 1, 2, 3, 4}
B {5, 25, 45, 65, 85}
C {0, 20, 40, 60, 80}
D {5, 45, 85, 125}

Answer 1

The answer to this question would be B:

Based on the question, since the weight of the weight plates are 20 lbs, this would be represented by the 20x in the function. As well, the 5 lb barbell would be represented by the 5 in the function. The range of the function is determined by the amount of weight plates are added. So if I added one weight plate the equation would equal, f(x) = 20(1) + 5 = 25. This continues on the more and more weight plates you add.

Hope this reached you well :)

Explanation:

20 = weight of the weight plates

x = amount of weight plates.

5 = weight of the barbell

f(x) = 20(0) + 5 = 5

f(x) = 20(1) + 5 = 25

f(x) = 20(2) + 5 = 45

f(x) = 20(3) + 5 = 65

f(x) = 20(4) + 5 = 85