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The region above $y = -4$ is shaded because the inequality $y > -4$ requires the y-coordinate to be greater than -4. On a standard coordinate plane, larger y-values are located above the horizontal line $y = -4$.

Conditions: The inequality restricts y.; The boundary is a horizontal line $y = -4$.

The region above $y = -4$ is shaded because the inequality $y > -4$ requires the y-coordinate to be greater than -4. On a standard coordinate plane, larger y-values are located above the horizontal line $y = -4$.

Conditions: The inequality restricts y.; The boundary is a horizontal line $y = -4$.

For an x-inequality, shade to the right if x is greater than the boundary value ($x > c$ or $x \ge c$), and shade to the left if x is less than the boundary value ($x < c$ or $x \le c$).

Conditions: The inequality restricts x.; The boundary is a vertical line $x = c$.

For an x-inequality, shade to the right if x is greater than the boundary value ($x > c$ or $x \ge c$), and shade to the left if x is less than the boundary value ($x < c$ or $x \le c$).

Conditions: The inequality restricts x.; The boundary is a vertical line $x = c$.

An inequality produces a vertical boundary when it restricts only the x-coordinate (e.g., $x = c$). It produces a horizontal boundary when it restricts only the y-coordinate (e.g., $y = c$).

Conditions: The inequality is in an xy-coordinate system.; The boundary is determined by replacing the inequality with equality.

An inequality produces a vertical boundary when it restricts only the x-coordinate (e.g., $x = c$). It produces a horizontal boundary when it restricts only the y-coordinate (e.g., $y = c$).

Conditions: The inequality is in an xy-coordinate system.; The boundary is determined by replacing the inequality with equality.