How to interpret the meaning of a slope of -1.6

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.