Mathematics Algebra Conceptual 13–14 yrs

Quadratic Graphs

二次函数图象

Description

Recognise that quadratic functions produce curved (parabolic) graphs, distinguish them from linear graphs, and use plotted quadratic graphs to estimate values and find approximate solutions

Mastery Evidence

✓ Explain why x² produces a U-shaped curve rather than a straight line
✓ Plot a simple quadratic such as y = x² − 4 from a table of values
✓ Read approximate solutions from a quadratic graph (e.g., where y = 0)

Assessment Prompt

Can your child recognise that an equation like y = x² produces a curved graph rather than a straight line, and use a plotted curve to estimate values?