Resources / Functions

🎯 Is the point on the graph?

Substitute the point's x into the function and compare with its y. If they differ, you will see which point on the graph has that x.

Function

y =

Point

(,)

Understood: 2x + 3 · x^2 − 4x + 3 · x² · (x − 1)(x + 2) · 0.5x · 1/x · sqrt(x)

Examples:
y = −x + 4✓ It is on the graph
xy−2−112345678−4−3−2−1123456Given point (6, −2)(6, −2)

Points

  • Given point:(6, −2)

Check

  1. Substitute x = 6 into y = −x + 4:
  2. f(6) = −2
  3. It matches the point's y: (6, −2) IS on the graph.

Practise functions

📈 Function Hunt📝 Functions exam📝 Lines exam🖨️ More resources
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