Which of the following sets of ordered pairs does represent as a function of x? a) {(4,2), (3,-5), (5,-5), (1,10)}

b) {(-1,2), (3,5), (5,5), (-1,5)}

c) {(1,2), (3,5), (5,7), (3,10)}

d) {(1,1), (3,1), (5,1), (5,11)}

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

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%

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?