Q.Equation of the straight line which by x-intercept and y-intercept as −3 and 2 respectively as:
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Coordinate Axes Equations
Imagine a blank sheet of paper. You want to describe exactly where a point is. The most natural way is to draw two perpendicular lines — one horizontal, one vertical — and measure distances from them. Those two lines are the coordinate axes.
The horizontal line is the x-axis. The vertical line is the y-axis. Where they cross is the origin, the point (0,0).
Now, here's the key idea: every point on the x-axis has a y-coordinate of 0. Why? Because to be on that horizontal line, you haven't moved up or down at all — your vertical distance from the axis is zero. Similarly, every point on the y-axis has an x-coordinate of 0 — you haven't moved left or right from the vertical line.
That's the entire intuition. Let's make it precise.
The Equations
x-axis: y=0
y-axis: x=0
That's it. These are the equations of the coordinate axes.
- y=0 means: "all points where the y-coordinate is zero, regardless of x." That's the entire horizontal line through the origin.
- x=0 means: "all points where the x-coordinate is zero, regardless of y." That's the entire vertical line through the origin.
A common mistake is to think y=0 means "the point (0,0)". No — it means every point with y=0, like (5,0), (−3,0), (100,0), etc. It's a whole line, not a single point.
Why This Matters
These two equations are the foundation for everything in coordinate geometry. Every other line, curve, or shape is described relative to these axes. For example:
- The line y=2 is a horizontal line parallel to the x-axis, shifted up by 2 units.
- The line x=−3 is a vertical line parallel to the y-axis, shifted left by 3 units.
So when you see y=0 or x=0, think: "the original, unshifted axes themselves." …
Use the intercept form ax+by=1 with a=−3, b=2. …
The required line is 2x−3y+6=0, matching option (b).
A line with x-intercept a=−3 and y-intercept b=2 has intercept form (NCERT Class 11 Straight Lines):
−3x+2y=1.
Multiply through by 6: −2x+3y=6, i.e. 2x−3y+6=0. Check: at y=0, x=−3; at x=0, y=2.
…
- CBSE 2026Set ANNUAL1 markQ.The equation of the x-axis is ______.
›Reveal solutionSolution
The equation of the x-axis is y=0.
The x-axis is the set of all points where the y-coordinate is zero, regardless of the value of x — i.e., points of the form (x,0).
…
- CBSE 2025Set ANNUAL1 markMCQQ.The intercept on the y-axis of the straight line 4x−5y−20=0 is(a) 4(b) -4(c) 5(d) -5
›Reveal solutionSolution
The y-intercept is −4.
The y-intercept of a line is the value of y when x=0.
…
- CBSE 2024Set ANNUAL1 markMCQQ.The equations of x-axis in space are:(a) x=0, y=0(b) x=0, z=0(c) x=0(d) y=0, z=0
›Reveal solutionSolution
y=0, z=0 — option (d).
The x-axis is the set of points where both the y-coordinate and z-coordinate are zero (only x varies). So its equations i …
- CBSE 2024Set ANNUAL1 markMCQQ.The equation of a line passing through the point (3,−4) and parallel to the x-axis is(a) x−4=0(b) x+4=0(c) y−4=0(d) y+4=0
›Reveal solutionSolution
A line parallel to the x-axis has a constant y-coordinate equal to the y-coordinate of the given point.
Any line parallel to the x-axis has the form y=k for some constant k.
…
- CBSE 2024Set ANNUAL1 markQ.Write the equation of the x-axis.
›Reveal solutionSolution
Since every point on the x-axis has y-coordinate 0, its equation is y=0.
…
- CBSE 2023Set ANNUAL1 markQ.Find the intercepts cutoff by the straight line 3x+2y=6 from the co-ordinate axes.
›Reveal solutionSolution
The line 3x+2y=6 cuts the axes at x=2 and y=3.
x-intercept (set y=0): 3x=6⇒x=2. …
- CBSE 2023Set ANNUAL1 markMCQQ.Equation of the straight line which by x-intercept and y-intercept as −3 and 2 respectively as:(a) 2x+3y=6(b) 3x−3y+6=0(c) 3x−2y=6(d) 3x+2y+6=0
›Reveal solutionSolution
The required line is 2x−3y+6=0, matching option (b).
A line with x-intercept a=−3 and y-intercept b=2 has intercept form (NCERT Class 11 Straight Lines):
−3x+2y=1.
Multiply through by 6: −2x+3y=6, i.e. 2x−3y+6=0. Check: at y=0, x=−3; at x=0, y=2.
…
- CBSE 2022Set ANNUAL1 markQ.The line x/3 + y/4 = 1 meets y-axis at the point ............ .
›Reveal solutionSolution
Setting x=0 in the intercept form directly gives y=4.
The line is given in intercept form:
3x+4y=1
A point on the y-axis has x=0. Substituting: …
- CBSE 2022Set ANNUAL1 markMCQQ.Equation of the straight line which has x-intercept and y-intercept as −3 and 2 respectively.(a) 2x+3y=6(b) 2x−3y+6=0(c) 3x−2y=6(d) 3x+2y+6=0
›Reveal solutionSolution
The line is 2x−3y+6=0.
With x-intercept −3 and y-intercept 2, the intercept form is −3x+2y=1.
Multiply by 6: −2x+3y=6, i.e. 2x−3y+6=0.
…
- CBSE 2021Set ANNUAL1 markQ.The line 4x + 3y = 12 meets x-axis at the point ............. .
›Reveal solutionSolution
Setting y=0 in 4x+3y=12 gives the point (3,0).
A line meets the x-axis where y=0.
…
- CBSE 2020Set ANNUAL1 markQ.Find the intercepts cut off by the straight line 3x+2y=6 from the co-ordinate axes.
›Reveal solutionSolution
The line 3x+2y=6 cuts the axes at x=2 and y=3.
For the x-intercept, set y=0: 3x=6⇒x=2. …
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