Which function described below has the greatest rate of change
l f(x)=5x+7
ll f(x)=1/3x-1
*THIS IS A CHART BY THE WAY*
lll x f(x)
1 4
2 8
3 12
4 16
A. l
B. ll
C. lll
D. They all have the same rate of change
I really need help fast

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.