It doesn't look as if you've done anything wrong. Just run the line back to the left until it does intersect with the vertical axis.
Hi!
I've been trying to work this out all evening and still don't know where I'm going wrong. If someone could give me some tips on how to work it out I would be so grateful!
We were given a table of results from an experiment and have to plot the graph and draw the line of best fit, which I have done and tried to copy on excel to post here. Then it asks to find the intercept of the line, this is the part I am stuck on as the line hasn't crossed the y-axis. Can someone please tell me what I'm doing wrong, and what I should be doing? Thanks so much in advance! The table and graph I plotted are as follows:
Temperature (ºC) Resistance (Ohms) 20 18.1 40 21.0 60 23.8 80 26.9 100
30.0
you have two options ...
(1) print the graph, then get out a ruler and extend the line to the y-axis ... "eyeball" the y-intercept.
(2) I believe excel has the capability to perform a linear regression to give you an equation for the line of best fit in the form y = ax+b ... b is the y-intercept.