The scatter plot shows the length of a spring when a stretch force is applied. the equation represents the linear model for this data.

y = 0.73x + 1

what does the number 1 in the equation mean in this context?

a. the spring requires a force of 0.73 pound to stretch 0.73 inch.

b. the spring stretches a distance of 1 inch when a force of 0.73 pound is applied.

c. the spring will stretch 1 inch for every pound of force applied.

d. the spring has a length of 1 inch when no force is applied.

e. the spring has no stretch when a force of 1 pound is applied.