To solve the given problem we will use the fact that the number of times the graph cuts the axis, that will be the degree of the function.
Given data:
We can see from the graph we can see that y- intercept is

and x- intercept are

Since the x - intercepts are

So, equation will have the form

But this equation does not satisfy the point

As on substituting x=0 in equation 1 we get

So, we should multiply the equatiojn (1) with some constant to satisfy the given condition.
So, the equation will be

So, the required equation is
