Answer:
it's 4
the reason it because in the graph 30 and so on are the same
The point B has coordinates (-4,2) and C has coordinates (-2,-2). We are going to calculate the slope of the line

Then, we are going to calculate the intercept using the slope m=-2 and the point (-4,2).
y=mx+b
2 = -2*(-4)+b
Isolating b we get
2-8=b= -6
The equation would be
y=-2x-6, option A
2x+4y=36 legs
2 for the two legged animals and 4 for the four legged animals
There are 10 animals so insert numbers that add up to 10 in for x and y
In this case x=2 y=8
Hope this helps!