Last updated on Sep 21, 2026

Functions/Graphs (Junior Cert Mathematics): Quizzes

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What is $f(1)$ if $f(x) = 2x^2 - 3x + 4$ ?

$3$

What is $f(-2)$ if $f(x) = 2x^2 - 3x + 4$ ?

$18$

If $f(x) = 5x - 8$ and $f(x) = 17$ , what is $x$ ?

$5$

When finding $x$ given $f(x)$ , what approach is used?

Working backward

For $y = -2x + 3$ , what is $y$ when $x = 0$ ?

$3$

For $y = -2x + 3$ , what is $y$ when $x = 2$ ?

$-1$

What shape does a linear function form on a graph?

Straight line

What are roots of a function?

Where $y = 0$

What are the roots of $f(x) = x^2 - 5x + 6$ ?

$x = 2$ and $x = 3$

What does $f(x) = g(x)$ represent on a graph?

Where two lines cross

If $f(x) = 3x + 2$ and $g(x) = 2x + 5$ , where do they intersect?

$x = 3$

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