Question

For experiment in botany,two different plants plant A and plant B were grown under similar laboratory conditions. Their height were meansured at the end of each week for3 weeks. The result are shown by the following graph

Answer 1

Answer:

ANSWER

In the graph x−axis represents weeks and y−axis represents the heights of the plant.

Scale :

On x−axis 7 cm =1 week

On y−axis 1 cm =1 cm in height

To find the height of plant at particular week: 

Trace the vertical line parallel to y−axis passing from the point on x−axis, find the point where this vertical line intersects the graph. 

Now from that point trace a horizontal line parallel to x−axis, this line intersects the y−axis at required point.

To find the week at particular height: 

Trace the horizontal line parallel to x−axis passing from the height point on y-axis, find the point where this horizontal line intersects the graph. 

Now from that point trace a vertical line parallel to y−axis, this line intersects the x−axis at required point.

Now,

a) Follow step 1 on graph for plant A at point i) 2 weeks and ii) 3 weeks, we get corresponding heights on y− axis, 7 cm for 2 weeks and 9 cm for 3 weeks.

b)  Follow step 1 on graph for plant B at point i) 2 weeks and ii) 3 weeks, we get corresponding heights on y− axis, 7 cm for 2 weeks and 10 cm for 3 weeks.

c) To find grow during 3rd week, we have to find the height difference between 2nd and 3rd week, which is 9 cm −7 cm =2 cm 

d) To find grow of plant B from end of 2nd week to end of 3rd week, we have to find height difference between 3rd and 2nd week, 10 cm −7 cm =3 cm

e) Find the grow of height level of plant A weekwise

    1st week: 1 cm −0 cm =1 cm

    2nd week: 7 cm −1 cm =6 cm

    3rd week: 9 cm −7 cm =2 cm

so plant A grows on 2nd week the most

f) Find the grow of plant B week-wise

   1st week: 2 cm −0 cm =2 cm

   2nd week: 7 cm −2 cm