The function is defined as 20 minus 5 times a number . If is graphed in the -plane, what is the best interpretation of the -intercept?
When the number is 0, .
When , the number is 4.
For each increase of 1 in the value of the number, increases by 20.
The value of decreases by 5 for each increase of 1 in the value of the number.
