Select the correct answer. Brad is planting flowers in a grid-like pattern in his garden. He is trying to determine the possible numbers of rows and columns in which he can plant his flowers. He determines that two possibilities are 8 rows and 25 columns or 10 rows and 20 columns. What is the constant of proportionality in this inverse variation?

Step-by-step explanation:

Given

Let R represents rows and C represents Columns

When R = 8, C = 25

When R = 10, C = 20

Required

Given that there exist an inverse variation, determine the constant of proportionality;

We start by representing the variation;

Convert proportion to an equation

Where k is the constant of proportion;

Multiply both sides by C

Reorder

When R = 8, C = 25;

The equation  becomes

When R = 10, C = 20;

The equation  becomes

Hence, the concept of proportionality is 200

b, i believe, but not sure.