Trendline, y intercept

Question

In a trend line of 4 observations, average of y is 80, slope of line is 28, what is intercept?

Answer 1

Let me first start out by saying that I am not 100% confident in this explanation. I believe the answer to this question is much easier than it appears. When we consider a trend line, we can only make estimations about the data. So, the coordinates on the trend line are only what we would expect to see, not necessarily what actually happened. So, the y-intercept is going to represent what we would expect to see as a y-value if the x-value was zero. The question is then, how does the information in the problem relate to the expected value of y? Hopefully that helps you a little. I won't tell you what I think the answer is.