Find out slope of dd curve from the following data:
`{:(P " Rs.40,",Q" 40units"),(P_(1)" Rs. 80,",Q" 20 units"):}`

Q Find out P and Q :

Calculate MPS and Multiplier (k) from the following data : {:("Income"(Rs.),100,200),("Saving"(Rs.),40,100):}

Calculate the values of Q_(1),Q_(3),D_(8)and P_(85) - from the following data : {:("Wages (Rs.)",0-10,10-20,20-30,30-40,40-50),("Number of Workers"," "22," "38," "46," "35," "19):}

The median of the following data is 50. find the values of p and q if the sum of all the frequencies is 90 {:("Marks ","Frequency "),(20-30," "p),(30-40," "15),(40-50," "25),(50-60," "20),(60-70," "q),(70-80," "8),(80-90," "10):}

E_(P) of a good is -4. When price of this good rises from Rs. 5 to Rs. 6 per unit , a consumer busy 40 units less . How many units did he buy at Rs. 5 ?

Find a unit vector in the direction from point P(1,-1,2) to point Q(-1,1,1) .