Given AC and DF are corresponding sides of a figure, find the lengths of the given sides that would maintain the congruence of the figures when AC = 10a + 9 and DF = 7a + 51

Which equation could represent the relationship shown in the scatter plot? y=−3x−2 y=−3/4x+10 y=−2/3x+1 y=9x−12 scatter plot with x axis labeled variable x and y axis labeled variable y. points go from upper left to lower right.