What is the (4,3); slope 1/2 in slope-intercept form?

Can someone explain the elimination method to me for this problem?

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.

Which of the following describes the symmetry of the graph of y = x3?