Does this graph represent a function? Explain.

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

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?