Here's a photo of the solution. Hope this helps and please give brainlist!
This is the answer, hope this helps you
Answer:
-1.3
Step-by-step explanation:
The graph shows the straight line passing through the points (3,-1) and (-3,7).
The slope of the line passing through the points
and
is

In your case, the slope is

The rate of change is -1.3
Answer:
48cm
Step-by-step explanation:
take width of rectangle to be=xcm
Length will be 3x
Area of rectangle=length × width
A=3x × x =3x²
3x²=108
x²=108/3=36
x²=36
x=√36=6cm
substitute
lenth=3x=3×6=18
width=x=6cm
perimeter=2l+2w
p=2×18 + 2×6
p=36+12=48cm