Math Problem Statement

If p(x) is the linear parent function, which of the following is the graph of p(x) = -2(x + 1)?

Solution

The question asks to identify the graph of p(x)=2(x+1)p(x) = -2(x + 1), which is a transformation of the parent linear function.

Step-by-step breakdown:

  1. Starting equation: p(x)=2(x+1)p(x) = -2(x + 1)

  2. Simplify the equation: p(x)=2(x+1)=2x2p(x) = -2(x + 1) = -2x - 2 The equation is in slope-intercept form y=mx+by = mx + b, where:

    • Slope (mm) = -2 (this means the line slopes downward at a steepness of 2 units for every 1 unit right)
    • Y-intercept (bb) = -2 (the line crosses the y-axis at -2)
  3. Graph properties:

    • The line has a negative slope, so it should be slanting downwards from left to right.
    • It should cross the y-axis at (0,2)(0, -2).
  4. Look at the options:

    • The correct graph must match these properties: downward slope and y-intercept of -2.

Based on the image, Option B correctly shows these characteristics:

  • It has a negative slope of -2.
  • The y-intercept is -2.

Thus, the correct answer is Option B.


Would you like further clarification on any part of this explanation? Here are some follow-up questions that might help:

  1. How do you calculate the slope of a line from an equation?
  2. What is the slope-intercept form, and why is it useful?
  3. How do transformations (shifts and stretches) affect the graph of a parent function?
  4. Why does the negative sign in front of the slope affect the direction of the graph?
  5. Can we verify the graph by plotting points?

Tip: When determining a graph from an equation, always look for key features like slope and intercepts. These help quickly identify the correct graph.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Graphing

Formulas

Slope-intercept form: y = mx + b

Theorems

Linear equation properties
Graph transformations

Suitable Grade Level

Grades 8-10