What is the x-coordinate of the function below when the y-coordinate is 0? (0,5) (2,-5)

The equation of the function is assumed to be a straight line is of the form,

,  where  

are the gradient and the y intercept respectively.

The gradient is computed using the formula for the gradient, i.e

.

The equation of the line is,

The equation of the function is ,

.

The value of the x-coordinate when the y coordinate is 0 is found as shown below.

.

so the x-coordinate is 1.

that tool would be a compass