Answer:

Step-by-step explanation:
Slope Formula: 
Simply plug in your 2 coordinates into the slope formula to find slope <em>m</em>:



Answer:
1a. Yes
1b. No
1c. Yes
Step-by-step explanation:
To transform a mixed number to an improper fraction, we must multiply the denominator by the large number, and add the numerator.
So for
: 
But we also put this over the denominator in the mixed number, so we get:
.
Then we do the same for
:

Then we must find a common denominator. Let's use 21 (multiply 3 and 7):


Now that we have a common denominator, we can subtract across:

Since
cannot be reduced any further, we are going to leave this as our answer.
So the answer is
.
You didn't include a picture of the answer choices, but this is what the answer would look like. Pretend the different shapes represent different rows:
ΔΔΔΔ
ββββ
αααα
There are three rows. 4 Books in each row.