is the slope between these two points. To figure out the slope between two points, we need to find the rise over run, which is the change in the <em>y value over the change in the x value</em>. This becomes:

And simplifies to:

, meaning that the slope between these two points is

.
The work become much simpler if you do it in a table. Hope this helps!!
So <span>the missing digit must be "6".</span>
Answer:
Quarter of an hour = 25 minutes
800 words in 25 minutes.
800 ÷ 25= 32