An air freshener starts with 25 grams and evaporates. in each of the following cases, write a formula for the quantity, q grams, of air freshener remaining t days after the start.
(a) the decrease is 4 grams per day.
(b) the decrease is 9% per day.
(c) the decrease is at a continuous rate of 12% per day.

A) Decrease is a constant rate. Therefore the function will be linear.

Q = 25 - 4t

b) Decrease is exponential. You will have a exponential function.

Q = 25(1-.09)^t  = 25(.91)^t

c) Decrease is exponential. You will have a continuous exponential function.

Q = 25e^(-.12t)

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!