Choose the correct statement about the basic method for constructing an influence line. according to the basic method, the influence line can be constructed by placing the unit load at a variable position x on the member and then calculating the value of the function (reaction, shear, or moment) at the point as a function of x. according to the basic method, the influence line for a loading (reaction, shear, or moment) is to the same scale as the deflected shape of the beam when the beam is acted upon by the loading. to draw this deflected shape, the capacity of the beam to resist the applied loading must be removed so the beam can deflect when the loading is applied.