If you drop a pencil randomly on a scatterplot, what aspect are you changing as you rotate the ...

If you drop a pencil randomly on a scatterplot, what aspect are you changing as you rotate the pencil about the point where it crosses the Y axis?
 
  a. the slope.
  b. the intercept.
  c. the correlation.
  d. the residual.

Question 2

If you drop a pencil randomly on a scatterplot, what aspect are you changing as you move the pencil vertically on the page without rotating it?
 
  a. the slope.
  b. the intercept.
  c. the correlation.
  d. the residual.

Question 3

If the slope is significant we know that
 
  a. the intercept is not significant.
  b. the intercept is significant.
  c. there is a strong relationship between the two variables.
  d. none of the above