Problema Solution
A lobster's age in years is appromimately his weight multiplied by 4 plus 3 years. Write this rule of thumb as a linear equation and determine the age of a 5-pound lobster. How much will a 15-year old lobster weigh?
Answer provided by our tutors
y = 4w + 3, where y is the lobster's age in years, w is his weight
for w = 5 lbs the age of the lobster is
y = 4*5 + 3
y = 23 years.
if the lobster is 15 years this means y = 15 years and we need to find w:
15 = 4w + 3
4w + 3 = 15
w = (15 - 3)/4
w = 3 lbs
A 15-years lobster will weight 3 pounds.