El resultado de la operacion 8+30 -: - 6 + 2 - 6 . 3 +4 -10 es = a : 10 b: 5 c: -9 d: -12 por favor con operacion

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.