The following observed value of x and y are thought to satisfy a linear equation. Write the linear equation-
Draw the graph using the value of x, y as given in the above table.
At what points the graph of the linear equation
(i) cuts the X-axis ?
(ii) cuts the Y-axis?
The linear equation for the line will be-
y = mx + c
Where, c is the y-intercept, which from the graph is 2.
⇒ c = 2.
Taking x1 = 6, y1 = – 2 and x2 = – 6, y2 = 6
Now, m = slope of the line
∴ the linear equation will be-
⇒ 3y = – 2x + 6 (multiplying whole equation by 3)
⇒ 2x + 3y – 6 = 0
Now, the point where graph cuts:
(i)x-axis
For this, y = 0.
∴putting x = 0 in 2x + 3y – 6 = 0, we get-
⇒ 2x + 3×0 – 6 = 0
⇒ 2x = 6
⇒ x = 3
∴ the point where graph cuts x-axis is(3, 0).
(ii) y-axis
For this, x = 0.
∴putting x = 0 in 2x + 3y – 6 = 0, we get-
⇒ 2×0 + 3y – 6 = 0
⇒ 3y = 6
⇒ y = 2
∴ The point where graph cuts y-axis is (0, 2).