Answer:
-5/4
Step-by-step explanation:
y=mx+b
m= slope
b= y-intercept
m= -5/4
W=L+2
A=48=L*W
48=L*(L+2)
48=L^2+L*2
0=L^2+L*2-48
L1=6
L2=-8 (can't be used since it's negative)
Lenght=6
Width=8
b