Q1 of 26 Page 98

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What is the equation of the X-axis?

y = m × x + c


Where c is the intercept of the line on y-axis and m is the gradient of the line. Since intercept of x-axis on y-axis is zero, so c = 0. Gradient of x-axis is also zero because it makes an angle zero with itself. So m = tan(theta) = 0. Putting these values in the general equation we get,


y = 0 × x + 0


y = 0. Thus we get the equation for x-axis as y = 0.

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