An independent health clinic's managers want to better understand its costs associated with x-rays. The clinic accountant assembled cost information and conducted a regression analysis that produced the following output:

Regression Statistics

Multiple R0.919

R Square0.846

Adjusted R Square0.824

Standard Error1442.971

Observations9

CoefficientsStandard Errort StatP-value

Intercept10,339.862077.024.970.001604

X-Rays2.450.406.210.000441

a.Provide an explanation of why you thinkthis model appears to explain the variation between observations of x-ray expenses well, or not.

b.Provide an estimate of the total costs for x-rays for a period in which the clinic expects to perform 7,000 x-rays.