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natalie2sheffield
19.07.2019 •
Mathematics
Steve plotted 3 points from the equation y = 3x on this coordinate grid. he drew a straight line through the points. which ordered pair would also be on this line? a. (+5, +15) b. (+4, +7) c. (+5, +3) d. (+12, +4)
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Ответ:
y = 3x
We note that the slope of the line is:
m = 3
Therefore, we must find which of the ordered pairs satisfies the equation:
For (5, 15) we have:
x = 5
y = 15
Substituting values:
15 = 3 (5)
Rewriting
15 = 15
The equation is satisfied.
An ordered pair that would also be on this line is:
A. (+5, +15)
Ответ:
To get this answer, we simply divide by five on both sides to isolate x