A construction crew is lengthening a road. Let y represent the total length of the road (in miles). Let x represent the number of days the crew has worked. Suppose that x and y are related by the equation 2x + 58 = y. Answer the questions below.

Note that a change can be an increase or a decrease.
For an increase, use a positive number. For a decrease, use a negative number.

What was the road's length when the crew started working?
__ miles
What is the change per day in the road's length?
__ miles