Math Problem Statement

y=x-5 solve by graphing

Solution

To solve the equation y=x5y = x - 5 by graphing, follow these steps:

1. Identify the equation:

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

  • mm is the slope of the line (the rate at which yy changes with respect to xx),
  • bb is the y-intercept (the point where the line crosses the y-axis).

In this case:

  • m=1m = 1 (because the coefficient of xx is 1),
  • b=5b = -5 (because the constant is -5).

2. Plot the y-intercept:

Start by plotting the y-intercept at (0,5)(0, -5). This is where the line crosses the y-axis.

3. Use the slope to find another point:

The slope m=1m = 1 means that for every 1 unit increase in xx, yy increases by 1. Starting from (0,5)(0, -5):

  • If x=1x = 1, then y=15=4y = 1 - 5 = -4, so plot the point (1,4)(1, -4).

4. Draw the line:

Once you have at least two points, draw a straight line through them. This line is the graph of y=x5y = x - 5.

Conclusion:

The graph of the equation will be a straight line that passes through (0,5)(0, -5) and (1,4)(1, -4) and extends infinitely in both directions.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Graphing
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 7-9