A hole has to be 2 ft deep. William is able to dig at a rate of #1/2# ft. per minute. How do you write an equation for when #y#, the amount he has left to dig is a function of #x#, the amount of time he has been digging?
Since my name is William so I feel inclined to answer this question as it pertains to my digging capabilities.
In general any function can be expressed as
We can write the equation as
Next lets check if we work the whole 4 minutes if the amount left is 0
we could continue to check more if you like.