Answer:
y= -4x+4
Step-by-step explanation:
y=mx+b
where x=-1, y=8, and m=-4
8=(-4)(-1)+b
8=4+b
4=b
Thus, y= -4x+4
Answer:
Below.
Step-by-step explanation:
A=2(wl+hl+hw)=2·(3.15·6.2+4·6.2+4·3.15)=113.86yd²
Answer:
The surface area of the model is 
Step-by-step explanation:
we know that
The surface area of the square pyramid is equal to the area of the square base plus the area of four lateral triangles
so
We can use slope , point formula
y-y1=m(x-x1)
m is a slope=(y2-y1)/(x2-x1)=(-10-(-7))/(2-1)=-3
for example, we take the point (1, -7)
y-(-7)=-3(x-1)
y+7=-3x+3
y=-3x-4
