State whether the linear model shown in the graph is exact or approximate. Then find the equation of the line. Ⓡ Ау 20- 18- 16- 14- 124 10- 8- 6- 4- 2- ottt X 0 2 4 6 8 10 12 14 16 18 20 N (...) Choose the correct answer below. approximate exact The equation of the line is (Type your answer in slope-intercept form. Use integers or fractions for any numbers in the equation.)