Problema Solution
A body was 3.4kg when he was born.for his ist six weeks his mass increased by about 0.3kg perweek.copy and complete the table below..week:0 1 2 3 4 5 6
Mass(kg):3.4,3.7,4.0,4.3,_,_,_
Using a scale of 2cm to 1unit on the y.axis and 2cm to 1kg on the x.axis..draw a graph of this information
Approximately how old was the boy when the body mass was 5kg
Answer provided by our tutors
The function determining the mass of the boy is:
y = 3.4 + 0.3x, where x is the number of weeks
To find out how old was the boy when the body mass was 5 kg we need to solve:
3.4 + 0.3x = 5
........
click here to see the equation solved for x
........
x = 16/3 weeks
x = 5 1/3 weeks
6 weeks + 5 1/3 weeks = 11 1/3 weeks
The boy was around 11 weeks old then his body mass was 5 kg.