Math Problem Statement

Graph this line: y+4=– 5(x–5)

Solution

To graph the equation y+4=5(x5)y + 4 = -5(x - 5), we first need to rewrite it in slope-intercept form, which is y=mx+by = mx + b, where mm is the slope and bb is the y-intercept.

Step 1: Simplify the equation

We start with:

y+4=5(x5)y + 4 = -5(x - 5)

First, distribute the 5-5 on the right-hand side:

y+4=5x+25y + 4 = -5x + 25

Next, subtract 4 from both sides to isolate yy:

y=5x+254y = -5x + 25 - 4

y=5x+21y = -5x + 21

Now, we have the equation in slope-intercept form:

y=5x+21y = -5x + 21

Step 2: Graph the line

  • Slope m=5m = -5: This means for every 1 unit increase in xx, yy decreases by 5 units.
  • Y-intercept b=21b = 21: The line crosses the y-axis at y=21y = 21.

Graphing Steps:

  1. Start at the y-intercept (0, 21) on the graph.
  2. From there, use the slope 5-5 to plot another point. From (0,21)(0, 21), move 1 unit to the right (positive xx) and 5 units down (negative yy) to the point (1,16)(1, 16).
  3. Draw a straight line through the points (0,21)(0, 21) and (1,16)(1, 16).

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope-Intercept Form Theorem

Suitable Grade Level

Grades 8-10