Tesla has introduced its cheaper rear-wheel drive Model Y in the US, priced at $45,990 or $37,490 after federal tax subsidies.The new Model Y option offers 357 miles of range, a single motor on the rear axle, and accelerates from zero to 60 in 5.4 seconds.Tesla hopes the cheaper EV will bolster sales, especially after experiencing a drop in sales amid protests and tough market conditions.Sales of Tesla's cheaper Model Y in Europe and China have not proven to be successful according to reports, with sales dropping in both regions.