Question

Determine the x-coordinate that would yield a y-coordinate of 30, assuming the pair follows the same trend that currently exists in the data set below.
{(45, 18), (38, 21), (26, 31), (64, 13), (29, 28), (33, 25), (49, 17)}

Answer 1

first you'd have to make a trendline with the points. you could do this by hand, but it would be faster to use a trendline calculator

https://www.graphpad.com/quickcalcs/linear1/

^ enter your x and y coordinates here

once you have your equation, set y = 30 and solve for x