Question No.18 (Alternate method) , Question No.17

Lesson#27
Question No.18 (Alternate method)
Q.18. A house was purchased for Rs. 1 million in 1980. It is worth Rs. 4 million in 1996. Assuming that the value increased by the same amount each year, find an equation that gives the value of the house after t years of the date of purchase. What was its value in 1990?
MathEx4.3 part (27)
Watch with Graphical Approach, Tabular Approach and Derivative Approach.
Hint:
Slope of the line = V2 ─ V1 / T2 ─ T1
Question No.17
Q.17 The population of Pakistan to the nearest million was 60 million in 1961 and 95 million in 1981. Using t as the number of years after 1961, find and equation of the line that gives the population in terms of t. Use this equation to find the population in (a) 1947 (b) 1997.
Introduction to Analytical Geometry
Chapter No 4
Exercise No 4.3
Mathematics
part 2