Answer:
Slope: Number of flowers per centerpiece.
Output: Number of flowers
Input: Number of centerpieces
Y-Intercept: Number of flowers in welcome display
Explanation:
Slope: Slope is the rise over run, which means that it is going to be a number. This is usually attached to your x value. So your slope will be 10/1, or your number of flowers per centerpiece.
Output: This is going to be your y value, or what everything else equals. This will be your number of flowers overall, in each centerpiece plus the welcome display.
Input: This will be the number that you put into the equation to get your answer, or total number of flowers. Your input will be your number of centerpieces.
Y-Intercept: This is your last value added onto the end, or your 20. This is the number of flowers in the welcome display.