Explaination needed . Q.1: Express the following linear equations in the form ax + by + c = 0 and indicate the values of a, b and c in each case:
(i) x – y/5 – 10 = 0
(ii) -2x+3y = 6
(iii) y – 2 = 0
Q.2. Write four solutions for each of the following equations:
(i) 2x + y = 7
(ii) πx + y = 9
Q.3: Find the value of k, if x = 2, y = 1 is a solution of the equation 2x + 3y = k.
Q.4: Draw the graph of each of the following linear equations in two variables:
(i)y = 3x
Q.5: If the point (3, 4) lies on the graph of the equation 3y = ax + 7, find the value of a.
Q.6: Show that the points A (1, 2), B ( – 1, – 16) and C (0, – 7) lie on the graph of the linear equation y = 9x – 7.
Class 9 Mathematics
Chapter 4 .
Note : Explaination needed .
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