The graph of a proportional relationship contains the point (-30, 18)
1 answer:
Answer:
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
we have the point (-30,18)
so
x=-30, y=18
Find the value of k
substitute
Simplify
Divide by 6 both numerator and denominator
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Answer:
Option (3)
Step-by-step explanation:
From the picture attached,
Bar graph sketched shows the grades earned by the students in an exam.
Number of students who achieved the grade A = 17
Number of students who achieved grade B = 14
Number of students with grade C = 5
Number of students with grade D = 9
Total students who took the exam = 17 + 14 + 5 + 9 = 45
Option (1)
" of the students earned a C"
Fraction of students who earned C =
=
=
Therefore, this option is incorrect.
Option (2)
"3% more students earned an A then B"
Percentage of students who earned A =
=
= 37.78%
Percentage of students who earned B =
=
= 31.11%
Difference in percentage = 37.78 - 31.11
= 6.67%
Therefore, this option is not correct.
Option (3)
"20% of the students earned a D"
Percentage of students who earned D =
=
= 20%
Option (3) is the correct option.
Option (4)
" of the class earned a B"
Fraction of class who earned B =
=
Therefore, Option (4) is not correct.