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Question
shilpas gym membership includes a one-time fee of $20. she then pays a discounted fee of $5 for each visit. the function that shows her average cost after x visits is: \\( f(x) = \frac{20 + 5x}{x} \\) recall the general form of a rational function: \\( f(x) = \frac{(a_m x^m + \dots + a_1 x + a_0)}{(b_n x^n + \dots + b_1 x + b_0)} \\) which statement defines the horizontal asymptote? \\( \circ \\) \\( m < n \\), so \\( y = 0 \\) is the horizontal asymptote. \\( \circ \\) \\( m = n \\), so \\( y = a_m / b_n \\) is the horizontal asymptote. \\( \circ \\) \\( m = n \\), so \\( y = 0 \\) is the horizontal asymptote. \\( \circ \\) \\( m > n \\), so there is no horizontal asymptote. done
Step1: Analyze the degrees of numerator and denominator
For the function \(f(x)=\frac{20 + 5x}{x}\), rewrite it as \(f(x)=\frac{5x+20}{x}\). The degree \(m\) of the numerator \(5x + 20\) (highest - power of \(x\)) is \(m = 1\), and the degree \(n\) of the denominator \(x\) is \(n=1\).
Step2: Apply the rule for horizontal asymptotes of rational functions
For a rational function \(y=\frac{a_mx^m+\cdots+a_0}{b_nx^n+\cdots + b_0}\), when \(m = n\), the horizontal asymptote is \(y=\frac{a_m}{b_n}\). Here, \(a_m = 5\) (coefficient of \(x\) in the numerator) and \(b_n=1\) (coefficient of \(x\) in the denominator).
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\(m = n\), so \(y=a_m/b_n\) is the horizontal asymptote.