The scatter plot below shows the algebra grades and the number of absences of different students for the first semester. Which o
f the following is the best interpretation of this scatter plot?
A. As the number of absences increase, the algebra grade stays the same.
B. Students who have fewer absences seem to have higher algebra grades.
C. Students who have the most absences seem to have higher algebra grades.
D. As the number of absences decrease, algebra grades stay the same.
A. As the number of absences increase, the algebra grade stays the same.
B. Students who have fewer absences seem to have higher algebra grades.
C. Students who have the most absences seem to have higher algebra grades.
D. As the number of absences decrease, algebra grades stay the same.
2 answers:
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Answer:
y = -6x +9
y = 9·(1/3)^x
Step-by-step explanation:
In each case, the y-intercept is 9.
Linear
The slope is rise/run = (3-9)/(1-0) = -6, so the equation is ...
y = mx + b . . . . . . . slope m, intercept b
y = -6x +9
Exponential
The ratio of value at x=1 to that at x=0 is 3/9 = 1/3. That is the "growth factor," so the equation is ...
y = 9·(1/3)^x
