Draw a line with slope zero. name the type of line

What term makes it inconsistent y=2x - 4

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55