Math Problem Statement

Graph the following system of equations: x - 4y = -1 and 2x - y = 2

Solution

To graph the given system of equations, let's first convert each equation into slope-intercept form, y=mx+by = mx + b, where mm is the slope and bb is the y-intercept.

Step 1: Rewrite the equations

  1. Equation 1: x4y=1x - 4y = -1

    • Solve for yy: 4y=x1-4y = -x - 1 y=14x+14y = \frac{1}{4}x + \frac{1}{4}
    • This equation has a slope m=14m = \frac{1}{4} and a y-intercept b=14b = \frac{1}{4}.
  2. Equation 2: 2xy=22x - y = 2

    • Solve for yy: y=2x+2-y = -2x + 2 y=2x2y = 2x - 2
    • This equation has a slope m=2m = 2 and a y-intercept b=2b = -2.

Step 2: Plot each line on the graph

  1. For the first equation y=14x+14y = \frac{1}{4}x + \frac{1}{4}:

    • Start by plotting the y-intercept at (0,14)(0, \frac{1}{4}).
    • From this point, use the slope 14\frac{1}{4} to find another point by rising 1 unit up and running 4 units to the right.
  2. For the second equation y=2x2y = 2x - 2:

    • Start by plotting the y-intercept at (0,2)(0, -2).
    • From this point, use the slope 22 to find another point by rising 2 units up and running 1 unit to the right.

Step 3: Find the Intersection Point

After plotting these lines, look for their intersection point. This point will be the solution to the system of equations, where both equations are satisfied.

Would you like more details on any of these steps, or have any questions?


Here are 5 related questions to deepen understanding:

  1. How do you find the slope and y-intercept from the standard form of a linear equation?
  2. What does the intersection point of two lines represent in a system of linear equations?
  3. How can you verify if a point lies on both lines without graphing?
  4. How would you graph a line if it’s given in point-slope form?
  5. How can you tell if a system of equations has no solution or infinitely many solutions?

Tip: When converting from standard form to slope-intercept form, isolate yy carefully, paying attention to the signs!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing Systems of Equations

Formulas

Slope-intercept form y = mx + b

Theorems

Intersection of two lines

Suitable Grade Level

Grades 8-10