Answer:
Step-by-step explanation:
The graph is a straight line graph.
Let find the equation of the straight line.
Equation of straight line is given as
y = mx + c
Where m is the slope and c is the intercept.
c is the intercept on y axis where x = 0.
Then, from the graph, where x = 0, y = 23.
Then, the intercept c = 24
First point is (0,24) and second point chosen is (80, 60)
The slope can be determined using
m = ∆y / ∆x = (60-25)/(80-0)
m = 0.4375
Then,
y = 0.4375x + 24
Then, we want to find the age (x) at height y = 50
50 = 0.4375x + 24
0.4375x = 50-24
0.4375x = 26
x = 26 / 0.4375
x =59.43 weeks
Directly from the graph the value is approximately 60weeks
