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Graph the inequality y 2x - 2.

Mathematics

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Graph of y = 2x − 2

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Key points of y = 2x − 2
Pointxy
y-intercept0−2
x-intercept10

Step-by-step solution

4 steps

The problem you provided in the image is "Represent the inequality y=2x−2y = 2x - 2 graphically." As discussed previously, y=2x−2y = 2x - 2 is an equation of a line, not an inequality. For an equation, the solution is just the line itself, and no shading is involved.

However, if you meant to represent an inequality such as y≥2x−2y \ge 2x - 2, y≤2x−2y \le 2x - 2, y>2x−2y > 2x - 2, or y<2x−2y < 2x - 2, then shading would be required.

Let's assume you meant the inequality y≥2x−2y \ge 2x - 2, as your graph shows a solid line, which is used for "greater than or equal to" (≥\ge) or "less than or equal to" (≤\le).

  1. Draw the boundary line.

    The boundary line is y=2x−2y = 2x - 2. You have already correctly drawn this line. Since the inequality is y≥2x−2y \ge 2x - 2, the line should be solid (continuous), which matches your drawing.

  2. Choose a test point.

    Pick a point that is not on the line. The easiest point to use is often the origin $(0, 0)$.

  3. Substitute the test point into the inequality.

    Substitute x=0x = 0 and y=0y = 0 into the inequality y≥2x−2y \ge 2x - 2:

    0≥2(0)−20 \ge 2(0) - 2 0≥0−20 \ge 0 - 2 0≥−20 \ge -2
  4. Determine the shaded region.

    The statement 0≥−20 \ge -2 is true.
    Since the test point (0,0)(0, 0) satisfies the inequality, and (0,0)(0, 0) is located above the line y=2x−2y = 2x - 2 (relative to the y-intercept at (0,−2)(0, -2)), you should shade the region above the line.

    • If the inequality were y≥2x−2y \ge 2x - 2, you would shade the region above the solid line.
    • If the inequality were y≤2x−2y \le 2x - 2, you would shade the region below the solid line.
    • If the inequality were y>2x−2y > 2x - 2, you would draw a dashed line and shade the region above it.
    • If the inequality were y<2x−2y < 2x - 2, you would draw a dashed line and shade the region below it.

    For the inequality y≥2x−2y \ge 2x - 2, you should shade the region above the line y=2x−2y = 2x - 2.

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