Math Problem Statement

Solve the system by graphing

Solve the system by graphing

Solution

The system of equations provided is:

  1. y=4x+1y = -4x + 1
  2. 2xy=52x - y = 5

To solve this system by graphing, let's break down the steps:

Step 1: Graph the first equation y=4x+1y = -4x + 1

This is in slope-intercept form y=mx+by = mx + b, where:

  • The slope m=4m = -4, meaning the line will go down 4 units for every 1 unit you move to the right.
  • The y-intercept b=1b = 1, which is where the line crosses the y-axis.

Step 2: Graph the second equation 2xy=52x - y = 5

Rearrange it to the slope-intercept form: y=2x5y = 2x - 5 Now, we see that:

  • The slope m=2m = 2, meaning the line goes up 2 units for every 1 unit to the right.
  • The y-intercept b=5b = -5, which is where the line crosses the y-axis.

Step 3: Plot the lines on a graph

  • For y=4x+1y = -4x + 1, start at the point (0,1)(0, 1) and use the slope of -4 to plot another point. Draw the line through these points.
  • For y=2x5y = 2x - 5, start at the point (0,5)(0, -5) and use the slope of 2 to plot another point. Draw the line through these points.

Step 4: Find the intersection

The solution to the system is where the two lines intersect.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Graphing Systems of Equations
Slope-Intercept Form

Formulas

Slope-intercept form: y = mx + b

Theorems

Intersection of two lines gives the solution to a system of equations

Suitable Grade Level

Grades 8-10