When distributed, it’s broken down to x^2 + 3x + 5x + 15, when you combine like terms, the answer is
x^+8x+15.
(22,11) it equals the about when you plug it in
We can assume that this growth rate can be expressed as y = mx + b as long as the slope is constant, because a quadratic or exponential formula wouldn't make much sense in this situation. If it is growing at least 2 inches a month, the slope (m) will be 2. As x (month) increases by 1 month, y (plant's height) increases by 2 inches. You could make it more, but as long as you plot the points in such a way that the slope for these points are 2 or higher, you will get the answer correct. If you have any other questions or need to clarify more about what you wanted let me know and I'll help.
Y=15/x or xy=15 it seems that a should be 15/x