Find x then use x to find y

Please help I am really stuck!

Describe what moves you could use to create the transformation of the original image shown at right

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212