Elephants are born with tusks, and their tusks grow 4 inches a year. A 1-
year old elephant's tusk measured 5 inches. Write a linear equation that
represents the situation. How long will the elephant's tusk be at 6-years
old?
It should be: y= 4x + 1 Since it grows four inches per year, and we can assume they are born with a one inch tusk. Then you can just solve the equation for y by substituting six for x. So at six years old the tusk will be 25 inches long
