The label on a box of Strike matches states ‘Average Contents 40 Matches'. The contents
of 30 boxes of Strike matches were counted
no. of matches 37 38 39 40 41 42 43
frequency
4 5 6 7 2
4
2.

a
Find the mean, median and modal
number of matches per box.
b Is the statement on the box true or not?​

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph