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Graph the inequality, x + y ≤ 1 treating it like a general equation.

Similarly graph the inequality x - y ≤ 3.

Now, shade the region of the given inequalities

according to their signs.

The red line represents x + y ≤ 1.

The green line represents x – y ≤ 3.

Graph the inequality, x - y ≥ -1 treating it like a general equation.

Similarly graph the inequality x + y ≤ 2.

Now, shade the region of the given inequalities

according to their signs

.

The green line represents x – y ≥ -1.

The red line represents x + y ≤ 2.