f(x) = 2x: every horizontal line meets the graph oncef(x) = 2x: हर क्षैतिज रेखा ग्राफ़ को एक बार काटती हैf(x) = 2x: har horizontal line graph ko ek baar kaatti hai

NCERT Fig 1.3 · Class 12 Maths · Chapter 1 · interactive diagram

Parts and what they mean

• x-axis (x-अक्ष) — The horizontal number line; inputs x are read here.
• y-axis (y-अक्ष) — The vertical number line; outputs y = f(x) are read here.
• Origin O(0, 0) (मूल बिंदु O(0, 0)) — Where the two axes cross.
• Graph of f(x) = 2x (f(x) = 2x का ग्राफ़) — A straight line through O with slope 2.
• Horizontal line y = 3 (क्षैतिज रेखा y = 3) — Any horizontal line y = k meets this graph exactly once, at x = k/2.
• Meeting point (1.5, 3) (प्रतिच्छेद बिंदु (1.5, 3)) — Only ONE x gives y = 3 (one-one), and some x gives every y (onto R).

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 1.3. Report a mistake