Question

# Two students A and B contributed Rs 100 towards the prime Minister's Relief fund to help the earthquake victims. Write the linear equation to satisfy the above data and draw its graph

Solution

## Consider the amount contributed by two students $$A$$ and $$B$$ is Rs $$X$$ and $$y$$.  Total amount acontributed by both A and B $$= Rs 100$$ $$x + y = 100$$ we can write it as $$y = 100 - x$$ Substituting $$x = 25$$ in the given equation $$y = 100-25=75$$ $$y=75$$ So we get Substituting $$x = 50$$ in the given equation $$y = 100-50$$ so we get $$y = 50$$ x   25    50y   7550 Now draw a graph using the points $$A (25,75)$$ and $$B (50,50)$$ Join the points $$AB$$ through a line and extend in both the directions.MathematicsRS AgarwalStandard IX

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