The range of the function is the distance from the maximum of the function to the minimum of the function. The minimum amount of pairs of plates that you can add to the bar (x) is 0, meaning you add no plates. The maximum amount of plates that you can add to the bar is 6, because this is how many plates come in one weight set. The range of the function is y values, and 0 and 6 are x values, so we must plug these values into the function to find the range values.
f(x) = 20x + 4 = 20(0) + 4 = 0 + 4 = 4
f(x) = 20x + 4 = 20(6) + 4 = 120 + 4 = 124
Therefore, the range of the function is 120 pounds, or from [4, 124].
Hope this helps!
The range of a function is the possible output values of the function. The range of [tex]f(x) =20x + 4[/tex] is [4,124]
Given that:
[tex]f(x) =20x + 4[/tex]
To determine the range of the function, we simply determine the value of f(x) using the input values
When no pair is added (this means x = 0).
So, we have:
[tex]f(0) =20 \times 0 + 4[/tex]
[tex]f(0) = 0 + 4[/tex]
[tex]f(0) = 4[/tex]
When 4 pairs are added (this means x = 4).
So, we have:
[tex]f(4) = 20 \times 4 + 4[/tex]
[tex]f(4) = 84[/tex]
When 6 pairs are added (this means x = 6).
So, we have:
[tex]f(6) = 20 \times 6 + 4[/tex]
[tex]f(6) = 124[/tex]
f(6) is greater than f(4).
i.e. [tex]124 > 84[/tex]
So, the range of the function is: [0,124] or [tex]4 \le x \le 124[/tex]
Read more about range at:
https://brainly.com/question/1632425
