Math Problem Statement

Graph using the slope and y-intercept. f(x) = 1 2 x − 1

Solution

We are given the linear function f(x)=12x1f(x) = \frac{1}{2}x - 1. To graph this, we will use the slope-intercept form of a line, which is:

y=mx+by = mx + b

Here:

  • mm is the slope.
  • bb is the y-intercept.

From the equation f(x)=12x1f(x) = \frac{1}{2}x - 1, we can identify:

  • The slope m=12m = \frac{1}{2}, meaning the line rises by 1 unit for every 2 units it moves to the right.
  • The y-intercept b=1b = -1, meaning the line crosses the y-axis at (0,1)(0, -1).

Steps to graph the function:

  1. Plot the y-intercept: Start at the point (0,1)(0, -1) on the y-axis.
  2. Use the slope 12\frac{1}{2}: From (0,1)(0, -1), move up 1 unit and 2 units to the right to get the second point (2,0)(2, 0).
  3. Draw the line: Connect the points and extend the line in both directions.

Would you like me to create a graph for you, or do you have any questions?


Here are 5 follow-up questions related to the topic:

  1. What is the significance of the slope in a linear equation?
  2. How does changing the slope affect the steepness of the graph?
  3. What happens if the y-intercept changes but the slope remains the same?
  4. How can we determine the x-intercept from this equation?
  5. How would the graph look if the slope was negative?

Tip: Always check both the slope and y-intercept before drawing a graph to ensure accuracy.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 8-10