For every 7 votes for candidate a, there are 4 votes for candidate c
Greetings :)
To find slope of two points we will need to use this equation: 
( 6 , -12 ) ( 15 , -3 )
Now let's replace the equation with the numbers. (it will be a fraction).
= 
The equation equals 9 over 9, which also equals 1.
The slope of the line is 1.
6 units (or whatever you’re measuring in)
Each little square represents 1 unit.
40x - 2 because you combine like terms so it's 40x and then combine 8 and -10