Answer:
Step-by-step explanation:
y=6x-7
Answer:
m = 
Step-by-step explanation:
Given
y = mx + b ( subtract b from both sides )
y - b = mx ( divide both sides by x )
= m
Knowing that a year later, the car is only worth 0.80 x, you can simplify that by stating that one year after purchase, the car is only worth 80% of its original purchase price.
Another way of stating that is that the car lost 20% of its value of the course of one year.
If you mean y= -3x*2.5 then yes, it's linear.