I'm not too sure about this, but I feel that it's a linear regression. A quadratic one eventually reverses direction, and an exponential one levels off and stops decreasing.
Answer: You need to purchase $280 dollars of merchandise to pay the same amount under both plans.
Step-by-step explanation:
Hi, to answer this question we have to write equations for each plan's cost.
The cost of plan a (A) is equal to the annual fee (72) plus y 75% (75/100= 0.75) of the listed price(x)
A =72 + 0.75 x
Same process for the cost of plan B (B)
B= 30+ 0.90 x
If both costs are equal
A=B
So:
72 + 0.75 x = 30+ 0.90 x
Solving for x:
72-30 = 0.9x-0.75x
42 = 0.15x
42/0.15 =x
x= $280
You need to purchase $280 dollars of merchandise to pay the same amount under both plans