Answer:
8.3
Step-by-step explanation:
The slope is undefined because of the formula y2-y1/ x2-x1
in this case in (5,4) the 5 is x1 and the 4 is y1. in (5,8) the five is x2 and the 8 is y2. Pug the number in for the formula and you will see that it is D. undefined.
7/20 converts to 35/100, so as a percent it is 35% and as a decimal it is .35.