Answer:
0
Step-by-step explanation:
It's a horizontal line, it has no slope.
The equation in required form is: -x+2y = 12
Step-by-step explanation:
Given equation is:

In order to convert the equation in 
Multiplying both sides by 2

subtracting x from both sides

Hence,
The equation in required form is: -x+2y = 12
Keywords: Linear equation, slope
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Answer:
137 of the students are girls and 389 are boys which in total is 526
Check the picture below.
now, looking at the picture's scaling, from the lower-left-corner up to 20 is 5 squares, the rectangles you see in the picture are 40 units each, namely 10 squares. Every square is 4 units, it goes up 12 squares, namely 48 units, and goes to the right by 30 squares plus 4 more, 34 squares, that's 136 units.
well, if we were to make a triangle for the slope, check the picture, it'd look like that.
Why is the slope negative? well, because is going down from left to right.