Math Problem Statement

Graph the equation y = -1/2x + 4 by plotting two points and drawing the line.

Solution

The equation provided in the image is:

y=12x+4y = -\frac{1}{2}x + 4

This is a linear equation in slope-intercept form, where:

  • The slope mm is 12-\frac{1}{2},
  • The y-intercept bb is 4.

Steps to plot the graph:

  1. Plot the y-intercept:

    • The y-intercept occurs when x=0x = 0, so plot the point (0,4)(0, 4). This means that one of the points should be at (0,4)(0, 4).
  2. Use the slope to find a second point:

    • The slope is 12-\frac{1}{2}, meaning for every 2 units you move to the right (positive xx-direction), you move 1 unit down (negative yy-direction).
    • Starting from (0,4)(0, 4), move 2 units to the right, arriving at x=2x = 2, and 1 unit down, arriving at y=3y = 3. The second point is (2,3)(2, 3).
  3. Connect the points:

    • Use the blue highlighter to draw a straight line connecting (0,4)(0, 4) and (2,3)(2, 3).

If you'd like more details on graphing linear equations or need further clarification, feel free to ask!

Related Questions:

  1. How do you graph a line with a positive slope?
  2. What happens to the graph when you change the slope to 12\frac{1}{2}?
  3. How do you find the x-intercept of a linear equation?
  4. Can you explain how the slope affects the steepness of the line?
  5. What would happen if the y-intercept was negative?

Tip: Always start graphing a line by plotting the y-intercept first, then use the slope to determine other points.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form
Graphing

Formulas

Slope-intercept form: y = mx + b
Slope formula: rise/run

Theorems

Graphing a line using slope and y-intercept

Suitable Grade Level

Grades 8-10