$\"\"$

(a)

The slope(m) is 0.

The slope of the horizontal line is zero.

Thus, the given slope indicates the line $\"\"$ .

$\"\"$

(b)

The slope(m) is $\"\"$ .

The slope is negative.

Thus, the only line $\"\"$ has the negative slope. \ \

$\"\"$

(c)

The slope (m) is 1.

The slope is positive.

Thus, the only line $\"\"$ has the positive slope. \ \ $\"\"$

(a) $\"\"$ .

(b) $\"\"$ .