You're assuming that this data set represents all of Mrs. Hassaan's pupils. Certain students could be missing from the histogram - for instance, there could be one or two students who missed the test, but for certain reasons will be taking a make-up exam. Their grade would not be recording in this data set, but they still contribute to the class size, and so would be unaccounted for here.
Answer:
Less than 25%
Step-by-step explanation:
1189 divided by 967 is 1.229576008...
1.229576008... multiplied by 967 is 1189
This number, 1.229576008..., is a multiplier
To be exact it increases by 22.9576008...%
That is less than 25%
If we make s = Senior tickets,
11s+1s
to find the values of c and s,w
If we express s in terms of c on t
s=21-2c
replacing this value on the first equation, we obtain

Placing c=6 on s=21-2c, we have

Thus the senior ticket costs $9 and the child ticket cost $6
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Slope = y2-y1 / x2-x1
= 24-19/9-4
= 5/5
= 1
solve for b
y=1x+b
19=1(4)+b
19=4+b
15=b
the equation of the line is y=x+15