The standard form of a line:
.
The point-slope form: 
We have the point (3, -1) and the slope m = -1. Substitute:

<em>add x to both sides</em>
<em>subtract 1 from both sides</em>

Answer:
10.5
Step-by-step explanation:
Because the digit at tenths place in 10.5 is greater than that of in 10.1

Im not good at math so i use math-way.com
The answers you should drag are 3 and 4