Question

I need help with number 2

Answer 1

The weight (y) will always be positive, the number of balls (x) too. So without the bucket, the function would be:

y = 1.6x

Now we have to add the weight of the bucket which is 2lb, or the same 32oz. 

So the function results:

y = 1.6x + 32 (oz.)

If there is 1 ball, the weight is 1.6+32 = 33.6 oz. If there are no balls, the weight is 0 + 32 = 32 oz.

It is very important that all terms in the equation are in the same units, oz. in this case. Otherwise, if you do not translate lb. to oz. the resulting equation will be wrong.

If you need the equation expressed in lb., you only need to multiply the equation by 1lb/16oz:

y =  = 0.1x + 2 (lb.)