Scientists are studying the temperature on a distant planet. let y represent the temperature (in degrees celsius).
let x represent the height above the surface (in kilometers). suppose that x and y are related by the equation =y−235x .
answer the questions below. note that a change can be an increase or a decrease.

for an increase, use a positive number. for a decrease, use a negative number.

what is the temperature change for each kilometer we go up from the surface?