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4. Linear Equations in Two Variables
easy
દર્શાવો કે બિંદુઓ $A (1, 2), B(-1, -16) $ અને $C(0, -7)$ એ સુરેખ સમીકરણ $y = 9x -7$ ના આલેખ પર આવેલા છે.
Option A
Option B
Option C
Option D
Solution
For $A (1,2),$ we have $2=9(1)-7=9-7=2$
For $B (-1,-16),$ we have $-16=9(-1)-7=-9-7=-16$
For $C (0,-7),$ we have $-7=9(0)-7=0-7=-7$
We see that the line $y=9 x-7$ is satisfied by the points $A(1,2), B(-1,-16)$ and $C(0,-7).$
Therefore, $A(1,2), B(-1,-16)$ and $C(0,-7)$ are solutions of the linear equation $y=9 x-7$
and therefore, lie on the graph of the linear equation $y=9 x-7$.
Standard 9
Mathematics
