On a 2-dimensional graph, the x- and y-axes typically cross

the point where they are cut receives the name of origin

Explanation:

The Cartesian plane (where the two-dimensional graphics are represented) is formed by two numerical lines, one horizontal and one vertical that are cut at one point. The horizontal line is called the axis of the abscissa or of the x (x), and the vertical, axis of the ordinates or of the y, (y); the point where they are cut receives the name of origin. and it is generally divided into four parts that are called quadrants.

The origin of coordinates is the reference point of a coordinate system. At this point, the value of all system coordinates is null.

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m