Math Problem Statement

Given f(x) = -3x + 5, find f(-2).

Solution

We are given the function f(x)=3x+5f(x) = -3x + 5 and asked to find f(2)f(-2).

To solve this, substitute x=2x = -2 into the function:

f(2)=3(2)+5f(-2) = -3(-2) + 5

First, calculate 3(2)-3(-2):

3(2)=6-3(-2) = 6

Now, add 5:

f(2)=6+5=11f(-2) = 6 + 5 = 11

Thus, f(2)=11f(-2) = 11.

Would you like further explanation or have any other questions?

Here are 5 related questions to explore:

  1. How do you find the value of f(x)f(x) for any given xx?
  2. What is the slope of the function f(x)=3x+5f(x) = -3x + 5?
  3. How do you interpret the y-intercept of the function f(x)=3x+5f(x) = -3x + 5?
  4. Can you determine the zeros of the function f(x)=3x+5f(x) = -3x + 5?
  5. How does changing the constant term in f(x)f(x) affect the graph?

Tip: Always substitute values carefully into functions and follow the order of operations to avoid mistakes.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Function Substitution

Formulas

f(x) = mx + b

Theorems

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Suitable Grade Level

Grades 6-8