Oh me being also confused
Answer:
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Step-by-step explanation:
The last option, the y-intercept.
Answer:
In the model, you can see that it is split up into four parts. It also shows that the whole model is 2/3. So, an equation you could write is 
Answer:
$2.50+$1.25 times M
Step-by-step explanation:
$10.75-$8.25=$2.50
$3.50-$2.25=$1.25
$2.50+$1.25=$3.75
As only one-time fee, we cancel out it, then only add on the per-month fee, which is $1.25 every month.