Questions: Graph the following piecewise function.
f(x) =
- -3 if x ≤ 1
- -1 if x > 1
Choose the correct graph below.
A. [Graph option A]
B. [Graph option B]
C. [Graph option C]
D. [Graph option D]
Transcript text: Graph the following piecewise function.
f(x) = \begin{cases}
-3 & \text{if } x \leq 1 \\
-1 & \text{if } x > 1
\end{cases}
Choose the correct graph below.
A. [Graph option A]
B. [Graph option B]
C. [Graph option C]
D. [Graph option D]
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Solution
Solution Steps
Step 1: Understand the Piecewise Function
The given piecewise function is:
\[ f(x) = \begin{cases}
3x + 1 & \text{if } x \leq 1 \\
x - 1 & \text{if } x > 1
\end{cases} \]
Step 2: Graph the First Piece
For \( x \leq 1 \), the function is \( f(x) = 3x + 1 \). This is a linear function with a slope of 3 and a y-intercept of 1. We need to plot this line for all \( x \) values less than or equal to 1.
Step 3: Graph the Second Piece
For \( x > 1 \), the function is \( f(x) = x - 1 \). This is a linear function with a slope of 1 and a y-intercept of -1. We need to plot this line for all \( x \) values greater than 1.
Step 4: Combine the Graphs
Combine the two pieces on the same graph. Ensure that the first piece ends at \( x = 1 \) and the second piece starts just after \( x = 1 \).
Step 5: Choose the Correct Graph
Compare the combined graph with the given options to select the correct one.
Final Answer
The correct graph is the one that shows:
A line with a slope of 3 and y-intercept of 1 for \( x \leq 1 \).
A line with a slope of 1 and y-intercept of -1 for \( x > 1 \).