<span>Spearman was an early intelligence researcher. He observed that scores on many different kinds of intelligence tests were correlated</span>
Observing that intelligence test items with very different content all correlated, Spearman hypothesized that <span> there was an underlying general factor of intelligence.
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Answer:
A coordinate system is a two-dimensional number line, for example, two perpendicular number lines or axes. The coordinates of the origin are (0, 0). An ordered pair contains the coordinates of one point in the coordinate system. A point is named by its ordered pair of the form of (x, y).
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