Answer:
(1,40) equation: y=40x
(2,50) equation: y=25x
(4,70) equation: y=17.5x
(7,80) equation: y=11.43x
does not represent a proportional relationship because they all have different equations.
The answer is negative one hundred 95 or -195
Since 7 out of 8 people use crust toothpaste, in a city with the population of 40,000, 87.5% of the people use crust. so 40,000*87.5%= 35,000.