Question

Marie pays $2.50 for 5 pencils. Use the drop-down menus to explain how to determine and

use the constant of proportionality, in dollars per pencil, that relates these values.

Answer 1

k = 0.5 or 1/2

y = 0.5 x

Explanation:

Constant of proportionality is the ratio between two quantities that are directly proportional. The constant value usually represented with letter k relates amount that falls and rise uniformly. In a situation where we have the ratio of a and b, the constant can be represented as k = a/b

Marie pays $2.50 for 5 pencils . Using the constant of proportionality, in dollars per pencil that relates this value,

The constant of proportionality(k) equals the total amount(y) of the pencil divided by the number of pencils(x).

k = y/x

y = 2.5

x = 5

k = 2.5/5

k = 0.5

y = kx

y = 0.5 x