To find the slope of a line, we can use the following formula:

m-term stands for slope or gradient. The formula is useful whenever you want to find a slope of two points.
Let these be the following:

Substitute the points in formula:

Negative multiply negative always come out as positive.

Since m stands for slope, we can say that:

The answer is 3 yards.
There are 3 feet in a yard, so if we divide 9 (the length of the rope in feet) by 3, then we get the amount of yards in the rope: 9/3=3.
I'm assuming you meant does y=12x pass through those coordinates, and if that's the case, then the answer is no.
Hope that helps :)
Answer:
$400
Step-by-step explanation:
20% = 1/5
$80 x 5 = $400