Math Problem Statement

Graph the line that represents this equation: y + 2 = (1/2)(x + 2).

Solution

The given equation is:

y+2=12(x+2)y + 2 = \frac{1}{2}(x + 2)

Let's break it down into steps to rewrite and graph the equation:


Step 1: Simplify the equation

Distribute 12\frac{1}{2} on the right-hand side:

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

Now, isolate yy by subtracting 22 from both sides:

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

Simplify further:

y=12x1y = \frac{1}{2}x - 1


Step 2: Identify slope and y-intercept

The equation is now in slope-intercept form: y=mx+by = mx + b, where:

  • m=12m = \frac{1}{2} (slope)
  • b=1b = -1 (y-intercept)

Step 3: Plot the line

  1. Start by plotting the y-intercept: (1)(-1) on the yy-axis (point (0,1)(0, -1)).
  2. Use the slope 12\frac{1}{2}: rise 11 unit up and run 22 units to the right from the y-intercept. This gives another point, (2,0)(2, 0).
  3. Connect these points to form the line.

Would you like further clarification on graphing or a step-by-step drawing? Here are related questions:


Related Questions:

  1. How do you determine the slope from an equation in slope-intercept form?
  2. What happens if the slope is negative instead of positive?
  3. How do you convert an equation from point-slope form to slope-intercept form?
  4. What does the y-intercept represent graphically?
  5. How would you graph an equation if it’s given in standard form Ax+By=CAx + By = C?

Tip:

Always check your slope by ensuring the ratio of the vertical change to the horizontal change is consistent across points!

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form
Graphing

Formulas

y = mx + b (Slope-Intercept Form)
Point-Slope Formula y - y1 = m(x - x1)

Theorems

Slope and Intercept properties for linear functions

Suitable Grade Level

Grades 8-10