Y=Mx + c
The slope is given already so it will be :
Y=-4x+c
Now you can find C by replacing the given points
-3=-4(8)+c
C=9
Final answer is :
Y= -4x+9
20:12
i think. 20 being the number of total students to 12 which is the number of boys
Take the square root of 10,000, which is 100.
The 3rd quadrant bc they are both negative points