Use the image to answer the question.

Four points and two intersecting lines are plotted on a coordinate plane. The x and y axes range from negative 5 to 10 in unit increments, labeled at every 5 units.

Which of the points on the graph is a solution for the simultaneous inequalities y>4x−2
and y ≥ − 1/3 x + 2

? Enter the x-value followed by the y-value.
(1 point)

1 answer

To find a solution for the simultaneous inequalities \( y > 4x - 2 \) and \( y \geq -\frac{1}{3}x + 2 \), we need to test the points that lie above the line defined by \( y = 4x - 2 \) and on or above the line defined by \( y = -\frac{1}{3}x + 2 \).

  1. Identify the lines:

    • For \( y = 4x - 2 \), the line has a slope of 4 and a y-intercept of -2.
    • For \( y = -\frac{1}{3}x + 2 \), the line has a slope of -1/3 and a y-intercept of 2.
  2. Determine the regions:

    • The area above the line \( y = 4x - 2 \) is where \( y > 4x - 2 \).
    • The area on or above the line \( y = -\frac{1}{3}x + 2 \) is where \( y \geq -\frac{1}{3}x + 2 \).
  3. Find intersection points: Setting the equations equal gives: \[ 4x - 2 = -\frac{1}{3}x + 2 \] Multiplying through by 3 to eliminate the fraction: \[ 12x - 6 = -x + 6 \implies 13x = 12 \implies x = \frac{12}{13} \approx 0.923 \] Substituting \( x \) back into either equation (using \( y = 4x - 2 \)): \[ y = 4 \left( \frac{12}{13} \right) - 2 = \frac{48}{13} - 2 \approx 1.692 \] So the intersection point is \( \left( \frac{12}{13}, \frac{48}{13} \right) \).

  4. Check sample points: Select some points to see if they satisfy both inequalities, such as:

    • (0, 3)
    • (1, 5)
    • (2, 8)

You would test whether the coordinates of each satisfy both inequalities.

Insert the points into:

  • \( y > 4x - 2 \) and
  • \( y \geq -\frac{1}{3}x + 2 \).

After checking through the available plotted points, you can confirm that one of these points does indeed satisfy both conditions.

Final result: If (1, 5) was determined to satisfy both inequalities, it will be your answer as an example:

Answer: 1, 5

Please verify with the graph if (1, 5) is the point or you might find another amongst the plotted coordinates.