The line of best fit is described by the equation ŷ = bX + a, where b is the slope of the line and a is the intercept (i.e., the value of Y when X = 0). This calculator will determine the values of b and a for a set of data comprising two variables, and estimate the value of Y for any specified value of X.
Three consecutive integers that have a sum of 45 are 14, 15 and 16. 14+15+16=45
Anything between 91 degrees and 179 degrees. You can pick any between these two.