Math Problem Statement

What is the range (or image) of the function h(x) = -3x + 4 when -2 ≤ x < 5?

Solution

We are given the function h(x)=3x+4h(x) = -3x + 4 with the domain 2x<5-2 \leq x < 5, and we need to find its range.

Step 1: Find the values of h(x)h(x) at the endpoints of the domain.

  1. At x=2x = -2: h(2)=3(2)+4=6+4=10h(-2) = -3(-2) + 4 = 6 + 4 = 10 So, h(x)=10h(x) = 10 when x=2x = -2.

  2. At x=5x = 5 (not included, but needed to find the boundary): h(5)=3(5)+4=15+4=11h(5) = -3(5) + 4 = -15 + 4 = -11 So, h(x)=11h(x) = -11 as xx approaches 5 from the left.

Step 2: Determine the range.

The function h(x)=3x+4h(x) = -3x + 4 is a linear function with a negative slope, meaning it decreases as xx increases. Therefore, as xx ranges from 2-2 to just below 5, h(x)h(x) ranges from 1010 to just above 11-11.

Hence, the range of h(x)h(x) is: 11<h(x)10-11 < h(x) \leq 10

Thus, the correct answer is the second option: 11<h(x)10-11 < h(x) \leq 10.

Would you like more details on any part of the solution?


Here are 5 related questions to expand on this concept:

  1. How do you find the range of a quadratic function on a given domain?
  2. What is the general method for finding the range of a function over an interval?
  3. How does the slope of a linear function affect its range?
  4. Can a linear function have a range that includes infinity?
  5. How would the range change if the domain of h(x)h(x) were extended to 3x6-3 \leq x \leq 6?

Tip: Always check the behavior of the function at the endpoints of the domain to determine its range correctly.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Range of a Function

Formulas

h(x) = -3x + 4

Theorems

Linear function properties
Range determination based on slope

Suitable Grade Level

Grades 9-11