Hilton Page
09/22/2023 · Middle School
hat is the slope of the secant line that intersects the graph of \( (x)=0.5^{-x} \) at \( x=1 \) and \( x=5 \) ?
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Step-by-step Solution
To find the slope of the secant line that intersects the graph of \( f(x) = 0.5^{-x} \) at \( x = 1 \) and \( x = 5 \), we can use the formula for the slope of a secant line:
\[ \text{Slope of secant line} = \frac{f(x_2) - f(x_1)}{x_2 - x_1} \]
Given:
- \( f(x) = 0.5^{-x} \)
- \( x_1 = 1 \)
- \( x_2 = 5 \)
Substitute the values into the formula to find the slope of the secant line.
Calculate the value by following steps:
- step0: Calculate:
\(\frac{\left(0.5^{-5}-0.5^{-1}\right)}{\left(5-1\right)}\)
- step1: Remove the parentheses:
\(\frac{0.5^{-5}-0.5^{-1}}{5-1}\)
- step2: Convert the expressions:
\(\frac{\left(\frac{1}{2}\right)^{-5}-0.5^{-1}}{5-1}\)
- step3: Convert the expressions:
\(\frac{\left(\frac{1}{2}\right)^{-5}-\left(\frac{1}{2}\right)^{-1}}{5-1}\)
- step4: Subtract the numbers:
\(\frac{30}{5-1}\)
- step5: Subtract the numbers:
\(\frac{30}{4}\)
- step6: Reduce the fraction:
\(\frac{15}{2}\)
The slope of the secant line that intersects the graph of \( f(x) = 0.5^{-x} \) at \( x = 1 \) and \( x = 5 \) is \( \frac{15}{2} \) or \( 7.5 \).
Quick Answer
The slope of the secant line is \( \frac{15}{2} \) or \( 7.5 \).
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