2. It is assumed that consumption C depends on income Y and that this relationship takes the form of the linear function C= a + bY. When Y is GH¢600, C is observed to be GH¢660. When Y is 1,000, C is observed to be GH¢900. What are the values of a and b in this function? Express C in terms of Y only. Find the consumption if a family's income is GH¢1,200.

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.