Question

what is the value of the function when X equals four? on a coordinate plane.

Answer 1

Solution :

From the given graph the x-intercept is 2 and y-intercept is -1 .

So, equation of line in intercept form is :

$\dfrac{x}{2} + \dfrac{y}{-1} = 1\\\\x - 2y = 2$

$y = \dfrac{x-2}{2}$

Now, putting x = 4 in above equation, we get :

$y = \dfrac{4-2}{2}\\\\y = 1$

Therefore, the value of function at x =4 is 1 .