Interpreting Graphs (Junior Cert Mathematics): Quizzes

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Interpreting Graphs
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10 questions from this quiz

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What are the roots of an equation?

Points where graph crosses xx-axis

To solve f(x)=0f(x) = 0 from a graph, what should you find?

Where graph crosses xx-axis

How do you solve f(x)=kf(x) = k using a graph?

Draw horizontal line at y=ky = k

When is a function negative?

When graph is below xx-axis

If f(x)=x24x+3f(x) = x^2 - 4x + 3 is below the xx-axis for 1<x<31 < x < 3, what does this mean?

f(x)f(x) is negative for 1<x<31 < x < 3

What is the minimum value of a graph?

The lowest point

For quadratic graphs, what are turning points?

Where graph changes direction

To find f(3)f(3) from a graph, what should you do?

Find yy-value when x=3x = 3

When is a function increasing?

Graph goes up left to right

When is a function decreasing?

Graph goes down left to right

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