How are the graphs of the functions [tex]f(x) = \sqrt{16} x[/tex] and [tex]g(x) = \sqrt[3]{64} x[/tex] related?

A. The functions [tex]f(x)[/tex] and [tex]g(x)[/tex] are equivalent.
B. The function [tex]g(x)[/tex] increases at a faster rate.
C. The function [tex]g(x)[/tex] has a greater initial value.
D. The function [tex]g(x)[/tex] decreases at a faster rate.



Answer :

To determine how the graphs of the functions [tex]\(f(x) = \sqrt{16} \, x\)[/tex] and [tex]\(g(x) = \sqrt[3]{64} \, x\)[/tex] are related, we need to compare their coefficients, as the coefficients determine the steepness of the lines.

1. Calculate the coefficient of [tex]\(f(x)\)[/tex]:
[tex]\[ f(x) = \sqrt{16} \, x \][/tex]
We need to find [tex]\(\sqrt{16}\)[/tex]:
[tex]\[ \sqrt{16} = 4 \][/tex]
Therefore, the function [tex]\(f(x)\)[/tex] simplifies to:
[tex]\[ f(x) = 4x \][/tex]

2. Calculate the coefficient of [tex]\(g(x)\)[/tex]:
[tex]\[ g(x) = \sqrt[3]{64} \, x \][/tex]
We need to find [tex]\(\sqrt[3]{64}\)[/tex]:
[tex]\[ \sqrt[3]{64} \approx 3.9999999999999996 \][/tex]
Therefore, the function [tex]\(g(x)\)[/tex] simplifies to:
[tex]\[ g(x) \approx 3.9999999999999996 \, x \][/tex]

3. Compare the coefficients of [tex]\(f(x)\)[/tex] and [tex]\(g(x)\)[/tex]:
[tex]\[ 4.0 \quad \text{(for \(f(x)\)) and} \quad 3.9999999999999996 \quad \text{(for \(g(x)\))} \][/tex]

Despite the slight numerical difference due to precision, mathematically they are very close, but strictly speaking:
[tex]\[ 4.0 > 3.9999999999999996 \][/tex]

Since the coefficient of [tex]\(g(x)\)[/tex] is slightly less than the coefficient of [tex]\(f(x)\)[/tex], the function [tex]\(g(x)\)[/tex] does not increase at a faster rate than [tex]\(f(x)\)[/tex], nor are the functions equivalent.

4. Determine the correct relationship:

Given that the coefficient of [tex]\(f(x)\)[/tex] is slightly larger, at the outset, [tex]\(f(x)\)[/tex] would theoretically start at a proportionately higher rate compared to [tex]\(g(x)\)[/tex]. Thus, the correct interpretation is:

The function [tex]\(g(x)\)[/tex] has a greater initial value.

Hence, the answer is:

The function [tex]\(g(x)\)[/tex] has a greater initial value.