Select all equations that could be used to find the measure of angle c, using the fact that the sum of all the angles in a triangle is equal to 180

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.