Reese Medina
07/10/2023 · Junior High School
Find the \( x \)-and \( y \)-intercepts of the rational function. (If an answer does not exist, enter DNE.) \[ t(x)=\frac{x^{2}-3 x-10}{x-8} \] \( x \)-intercept (smaller \( x \)-value) \( \quad(x, y)=(\square) \) \( x \)-intercept (larger \( x \)-value) \( \quad(x, y)=(x, y)=(\square) \) \( y \)-intercept
UpStudy ThothAI Solution
Tutor-Verified Answer
Step-by-step Solution
To find the \( x \)- and \( y \)-intercepts of the rational function
\[
t(x) = \frac{x^2 - 3x - 10}{x - 8},
\]
we will follow these steps:
### Finding the \( x \)-intercepts
The \( x \)-intercepts occur where \( t(x) = 0 \). This happens when the numerator is equal to zero (as long as the denominator is not zero at those points).
1. Set the numerator equal to zero:
\[
x^2 - 3x - 10 = 0.
\]
2. Factor the quadratic:
\[
(x - 5)(x + 2) = 0.
\]
3. Solve for \( x \):
\[
x - 5 = 0 \quad \Rightarrow \quad x = 5,
\]
\[
x + 2 = 0 \quad \Rightarrow \quad x = -2.
\]
Thus, the \( x \)-intercepts are \( (-2, 0) \) and \( (5, 0) \).
### Finding the \( y \)-intercept
The \( y \)-intercept occurs where \( x = 0 \).
1. Substitute \( x = 0 \) into the function:
\[
t(0) = \frac{0^2 - 3(0) - 10}{0 - 8} = \frac{-10}{-8} = \frac{10}{8} = \frac{5}{4}.
\]
Thus, the \( y \)-intercept is \( (0, \frac{5}{4}) \).
### Summary of Intercepts
- \( x \)-intercept (smaller \( x \)-value): \( (x, y) = (-2, 0) \)
- \( x \)-intercept (larger \( x \)-value): \( (x, y) = (5, 0) \)
- \( y \)-intercept: \( (0, \frac{5}{4}) \)
So, the final answers are:
- \( x \)-intercept (smaller \( x \)-value): \( (-2, 0) \)
- \( x \)-intercept (larger \( x \)-value): \( (5, 0) \)
- \( y \)-intercept: \( (0, \frac{5}{4}) \)
Quick Answer
x-intercept (smaller x-value): (-2, 0)
x-intercept (larger x-value): (5, 0)
y-intercept: (0, 5/4)
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