Tony says he can calculate the slope without even using the graph, as long as he knows two points. He uses the points (-5, -2) and (-3, 1) to prove it.

Explain how Tony proves that the slope is 3/2
​
just by using these two points.

i dont know

step-by-step explanation:

the reason i dont know is because i have not taken this class and for that reason i haven't learned this stuff

hope i could

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be