A class measured the radius and circumference of various circular objects. The results are plotted on the graph below. Does there appear to be a proportional relationship between the radius and circumference of a circle? Explain your reasoning Answer pls

Reflect the point (7,0) across the y-axis

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

What term makes it inconsistent y=2x - 4