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Which function has a range of {y|y ≤ 5}?

Question

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Solution

Step 1: Define the Problem

Identify which function has a range where all values of y y are less than or equal to 5.

Step 2: Break Down the Problem

Consider different types of functions and their typical ranges:

  • Linear functions
  • Quadratic functions
  • Constant functions
  • Exponential functions
  • Logarithmic functions

Step 3: Apply Relevant Concepts

A function with a range of {yy5}\{y \mid y \leq 5\} implies that the maximum value of y y is 5, and all other values are less than or equal to 5. This is characteristic of functions that have a maximum point or are constant.

Step 4: Analysis, Verify and Summarize

  • Constant Function: A function like f(x)=5 f(x) = 5 has a range of {5}\{5\}, which fits the condition y5 y \leq 5 .
  • Quadratic Function: A downward-opening parabola, such as f(x)=x2+5 f(x) = -x^2 + 5 , has a maximum point at y=5 y = 5 and decreases from there, fitting the range condition.
  • Linear Function: A linear function like f(x)=x+5 f(x) = -x + 5 can also have a range of {yy5}\{y \mid y \leq 5\} if it is decreasing.

Final Answer

A quadratic function such as f(x)=x2+5 f(x) = -x^2 + 5 or a constant function like f(x)=5 f(x) = 5 has a range of {yy5}\{y \mid y \leq 5\}.

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