See https://web2.0calc.com/questions/can-someone-help-please_7.
The cost is $100. Take $325, and subtract $125. It gives you $200. And you have to divide that in half cuz the price is twice the cost. So the cost is $100
(* I love getting brainliest! ;) *)
if you put the points into the equation y2 - y1/x2 - x1 you'll end up with a zero in the denominator, which indicates a vertical slope. Basically the slope(m) is undefined
It's really easy to tell if your answer is going to be undefined if both the x values are the same (in this case they're both 9)
Answer: 
Step-by-step explanation:
The answer for # 1) B 1/3
is #2 not the same quesztion tho ?
