Will you please explain how to setup and solve this equation. I am a stumped on where to begin. I appreciate all your help. Thank you.

Question 19 Mountain climbers use a general rule of thumb which estimates that the temperature will drop 3.5 degrees Fahrenheit for every 1000 ft of elevation. The temperature is 840 F at an elevation of 5,000 feet, but we will record the elevation in thousands of feet. Identify two variables to represent this situation by choosing two letters and describing what each represents. Select an answer The variable e represents the elevation in thousands of feet t of a mountain in feet The variable T represents the temperature Select an answer speed in feet per minute speed 1000 feet temperature Write a linear equation using these two variables. 3.5 degrees Select an answer elevation in thousands of feet T = feet per degree degrees per foot Use your equation to determine the temperature at 11,000 feet. feet Select an answer v degrees Use your equation to determine at what elevation the temperature will be freezing (320 F). Select an answer v Convert your answer to miles using a conversion factor. Note that 5280 feet = 1 mile. Select an answer feet per mile miles per minute eet miles