Mathematics Algebra Procedural 13–14 yrs

Estimating answers (age 13+)

估算答案（13岁以上）

Description

Use graphs of linear and quadratic functions to estimate output values for given inputs, find approximate solutions to equations, and interpret graphical information in real-world contexts

Mastery Evidence

✓ Read off an approximate y-value for a given x from a plotted curve
✓ Find approximate solutions to an equation by identifying where a graph crosses the x-axis or another line
✓ Interpret a real-world graph (e.g., distance–time) to answer contextual questions

Assessment Prompt

Can your child use a graph — whether a straight line or a curve — to read off an answer to an equation approximately, rather than solving it algebraically?