Codecademy: Codeyear Improve our Car

//sample solution


function Car( listedPrice ) {
    var price = listedPrice;
    this.speed = 0;
    this.numWheels = 4;
   
    this.getPrice = function() {
        return price;
    };
}

// Write the accelerate method for Car here.
Car.prototype.accelerate = function(){
this.speed += 10;  
};