Function Notation

Tap the value of x to substitute

Evaluate when

f( {{ s1.selectedValue !== null ? s1.selectedValue : '?' }} ) = {{ s1.m }} · {{ s1.selectedValue !== null ? s1.selectedValue : '?' }} {{ s1.b >= 0 ? '+' : '−' }} {{ Math.abs(s1.b) }}
= {{ s1.m * s1.targetX }} {{ s1.b >= 0 ? '+' : '−' }} {{ Math.abs(s1.b) }} = {{ s1.correctAnswer }}

Substitution Step-by-Step

Slide to evaluate

Find the value of x where .

-404
x = {{ s2.currentX }}

Reading the Graph

Tap to locate

Find a point on the graph where .

x y = f(x)

Which one IS a function?

Tap to pick

A relation is a function when every x has exactly one y.

✓ Function Two y's at x={{ opt.failX }}! Option {{ String.fromCharCode(65 + idx) }}
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Masterful!

You've successfully evaluated functions, read graphs, and passed the vertical line test.