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Sagot :
[tex]\\ \sf\longmapsto x\propto y[/tex]
[tex]\\ \sf\longmapsto x_1y_2=x_2y_1[/tex]
[tex]\\ \sf\longmapsto 6y_2=42(3)[/tex]
[tex]\\ \sf\longmapsto 6y_2=126[/tex]
[tex]\\ \sf\longmapsto y_2=\dfrac{126}{6}[/tex]
[tex]\\ \sf\longmapsto y_2=21[/tex]
Answer:
- y = 7x
- y = 21
Step-by-step explanation:
Direct variation formula:
- y = kx
Given:
- x = 6, y = 42
Find k:
- 42 = 6k
- k = 42/6
- k = 7
The equation of line is:
- y = 7x
Now, when x = 3, the value of y is:
- y = 7*3 = 21
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