Answer:

Step-by-step explanation:
The formula of a slope:

If
m > 0, then a line is rising
m < 0, then a line is falling
m = 0, then a line is horizontal
m is undefined, then a line is vertical
<h2>a.</h2>
(2, 1) and (4, 5)

<h2>b.</h2>
(-1, 0) and (3, -5)

<h2>c.</h2>
(2, 1) and (-3, 1)

<h2>d.</h2>
(-1, 2) and (-1, -5)

-Notice that dividing our numbers leaves no remainder:
1,620 ÷ 5 = 324 + 0
-1,620 has all the factors of the number 5
Multiply 7 x 12 which is 84, 8x2 is 16, 16 divded by 3 is 5, so 5 minutes