Determine the equations of the following straight lines and draw the lines on separate graphs a) L passes through ( 2, 3 ) and has slope=-) b) Ly passes through (-2, 1 ) and (1, 2 ) ( ) Ly passes trough (4, 0) and (0, 6) d ) Ly passes through (aID) and (0, b), ato Sketch in the xy-plane the set of all pairs of numbers ( x, 4 ) that satisfy all the following three inequalities : 4x + 5g - 20, X20, and yzo Find the equilibrium price ( P) and quantity demanded and supplied for the following model of supply and demand ( Hint: equilibrium is when the quantity demanded, D, is equal to the quantity supplied, 5.) D = 49 - -P , and S = 10+3P