Baby weight

Overview

Using this Resource

Connecting to the Curriculum

Marking Student Responses

Working with Students

Further Resources

This task is about reading information from a line graph.

Question 1Change answer

Weight of babies from birth to 12 weeks

Weight of babies from birth to 12 weeks

a) How much did the baby weigh at 4 weeks? kg

b) How much did the baby weigh at 8 weeks? kg

c) If the baby grew at the same rate, how much would it weigh at 14 weeks? kg (Give your answer to the nearest 0.1 kg)

d) What was the baby's average weekly growth rate over the first 12 weeks? kg/week (Round to 1 decimal place.)

Task administration:

This task is completed with pencil and paper or online with auto-marking.

Level:

Curriculum info:

Keywords:

Description of task:

Students interpret a line graph of the weight of a baby over 12 weeks and answer questions about weight, forecasting and the rate of change.

Learning Progression Frameworks

This resource can provide evidence of learning associated with

within the Mathematics Learning Progressions Frameworks.

Answers/responses:

Diagnostic and formative information:

	Student response	Likely calculation	Likely misconception
c)	9 kg		Not extrapolating accurately or rounding to nearest whole number.
d)	0.4 kg/week	(8 - 4.4) ÷ 10	Used the rate of growth for the 10 weeks when the baby was growing, rather than the full 12 weeks.