Answer:
k = 0.5 or 1/2
y = 0.5 x
Step-by-step 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
