The estimate of the life expectancy of a child in 1950 is 59 years
What are linear equations?
Linear equations are equations that have constant average rates of change. Note that the constant average rates of change can also be regarded as the slope or the gradient
How to determine the solution to the system?
A system of linear equations is a collection of at least two linear equations.
In this case, the linear equation is represented by the graph
The life expectancies are given as:
52 years = 1900
66 years = 2000.
Using the midpoint formula, the estimate of the life expectancy of a child in 1950 is calculated as:
Life expectancy = (Year 1950 + Year 2000)/2
This gives
Life expectancy = (52 + 66)/2
Evaluate
Life expectancy = 59
Hence, the estimate of the life expectancy of a child in 1950 is 59 years
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