Due to improved technology and publicservice campaigns the n

Due to improved technology and public-service campaigns, the number of collisions at highway-railroad crossings per year as declined since 1975. Let N be the number of collisions (in thousands) for the year that t years since 1970. Find the N-intercept of your linear model. What does it mean in this situation?

Solution

Let\'s we assume a linear model

N = At +B

at t= 0 ; N = N₀

B = N₀

N -N₀ = At {As we know A is rate of number of collisions which is decreasing with time}

N -intercept of linear model is Population at t= 0 years