Solve 5(x-3)=y(4-3x) to make x the subject

The table represents a linear function. what is the slope of the function? –6 –4 4 6

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%

Extra points! find the missing dimension! need asap