Find (a) the slope (if it is defined) of a line containing the two given points, (b) the equation of the line containing the two points in slope-intercept form, and (c) the ordered pair identifying the line's y-intercept, assuming that it exists. If appropriate, state whether the line is vertical or horizontal. (4,3), (4,2) a) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The slope is. (Type an integer or a simplified fraction.) B. The slope is undefined. Find (a) the slope (if it is defined) of a line containing the two given points, (b) the equation of the line containing the two points in slope-intercept form, and (c) the ordered pair identifying the line's y-intercept, assuming that it exists. If appropriate, state whether the line is vertical or horizontal. (4,3), (4,2) a) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The slope is. (Type an integer or a simplified fraction.) B. The slope is undefined.