Can you please help me with c

Elevation -2 8 . 3 0 2 ,f s = 11.3603 RSq = 97.00 Notice that "Elevation" is listed under " refers to a in the equation 9 = a + bx. 3.511 8.79 0.003 Predictor.\" This means that elevation is the explanatory variable X. Its coefcient is the slope b. "Constant" (a) Use the printout to write the least- squares equation. 9 = 316.62 q + 28.3027 v x (b) For each 1000-foot increase in elevation, ' how many fewer frost-free days are predicted? (Round your answer to three decimal places ) 1' 23.302 , y ~ (c) The printout gives the value of the cue i fcient of determination r2. What is the value of r? Be sure to give the correct sign for r based on v.1 the sign of b. (Round your answer to four decimal places.) ; i 0.1508 x k (d) What percentage of the variation In y can be explained by the corresponding variation in x and the least-squares line? 97.0 v % L What percentage is unexplained? ' 3.0