Mathematics for IGCSE & O level - Sketching Curves (Section 2 - No. 2)
Which of the following equations represents a linear graph?
y = x² + 2x + 1
y = 2x + 3
y = 1/x
y = 2^x
Explanation
A linear equation has the form y = mx + c, where m is the slope and c is the y-intercept.
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