between z=1.45 and z=2.12

greater than z =1.75 or less than z= -0.90

exactly equal to z= 1.50
if the equation resulted from regression analysis involving a set of ten (x,y) data point.
what is the value of y when x = 3

To find the value of y when x = 3 in a regression analysis equation, you would need the regression equation or the regression coefficients. This would allow you to plug in the value of x into the equation to calculate the corresponding value of y.

Since you mentioned that the equation resulted from a regression analysis involving a set of ten (x, y) data points, we can assume that you have already performed the regression analysis and obtained the equation.

Without the specific equation, it is not possible to provide an answer to the value of y when x = 3. Please provide the regression equation or the regression coefficients so that a specific calculation can be performed.