The insurance company provided by darrell's company has a $1000 deductible and a 20% copay. how much will he have to pay for elbow surgery that will cost $9000?

Darrel will have to pay the deductible cost of $1000 and the 20% of the total cost of the elbow surgery
Darrel's surgery = Deductible + 20% of surgery cost
where
Deductible= $1000
20% of surgery = $9000 x .2
                          = $1800
Darrel's elbow surgery = $1000+$1800
                                        = $2800
Darrel will have to pay a total of $2800 for his elbow surgery. 
 

Y= -2x-1 the negative in front of the 2 is because the slope is negative and the -1 is because it’s down 1 on the y axis.