SOLUTION: Please help me to solve this problem. If {{{C=7+0.6I-0.25sqrt(I)}}} is a consumption function, find the marginal propensity to consume and the marginal propensity to save when I=16

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Question 464072: Please help me to solve this problem. If C=7%2B0.6I-0.25sqrt%28I%29 is a consumption function, find the marginal propensity to consume and the marginal propensity to save when I=16.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
dC%2FdI+=+0.6+-+0.25%2A%281%2F%282sqrt%28I%29%29%29+=+0.6+-+0.125%2Fsqrt%28I%29.
When I = 16. dC%2FdI+=+0.6+-+0.125%2F4+=+0.56875