There are 12 inches per foot. If the tree is 48 feet tall, it is 48 x 12 = 576 inches tall.
Answer:
The y-intercept would be 7
The slope would be -1 or -1/1. They are both the same thing.
The slope is the number which is located directly to the left of the variable (the variable in this case is x, but in other situations it could be a totally different letter).
