要画一个周长是37.68厘米的圆,所用圆规两脚张开的距离应是( )
— What are you going to do this Saturday?
— There _______ an English party in our school. I'm going to take part in it.
作出反比例函数y=12x的图象,并根据图象解答下列问题:
(1)当x=4时,求y的值;
(2)当y=﹣2时,求x的值.