I am driving west from Nashville at a constant speed. My distance west from Nashville t hours after noon is given by D = 66t + 29 miles. Identify the initial value and growth rate, and explain in practical terms their meaning.

In practical terms this means that at noon I was x miles west of Nashville and I am driving west at a rate of x mph.

Initial value 29 miles out (west) of Nashville (all before noon)

I drive at a constant speed  at a rate of 66 miles per hour

Step-by-step explanation:

The initial value is 29 miles, that means that before noon, I had already traveled 29 miles far away from Nashville, it is known neither at what speed I drove nor the previous speed before noon

And I am driving at (constant speed) 66 miles per hour, which means that I travel 66 miles each hour.