Mathematics for IGCSE & O level - Graphs Of Functions (Section 4 - No. 23)
When drawing a reciprocal graph, why is it useful to consider both positive and negative values of x?
To find the vertex.
To find the y-intercept
To show the two separate branches of the graph
To determine the slope of the graph
Explanation
Reciprocal graphs have two branches; considering both + and - x values shows both branches.
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