Answer:
-1
Step-by-step explanation:
The formula for slope is:
where
and
are points
Plug in (-5,3) and (-3,1) into the equation, and you get:

ANSWER
45 green bands
EXPLANATION
The ratio of red hair bands to green hair bands is
5 : 9
The total ratio is:

If there are a total of 70 hair bands,
Then the number of green bands

Simplify

Multiply

Therefore, there are 45 green bands.
There is approximately 10 cards at the start