Formula for solving that equation is

y=kx find k then substitute k to check the equation if it is equal

y=kx find k then substitute k to check the equation if it is equal

No

Step-by-step explanation:

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1. y= 28 when is x=7 y=kx 28=k(7) 28=7k ...divide 28 by 7 k=4 Hence, the equation is y=4x 2.y=30 when x=8 y=kx 30=k(8) 30=8k ...divide 30 by 8 k=15/4 Hence, the equation is y=15/4x 3. y=0.8 when x=0.4 y=kx 0.8=k(0.4) 0.8=0.4k ...divide 0.8 by 0.4 k=2 Hence, the equation is y=2x.

1. k= 28/7=4

y= 4x

2. k= 30/8 = 15/4 or 3 3/4

y=3 3/4x

3. k= .7/.4 = 7/4 or 1 3/4

y= 1 3/4x

4. k= .8/.5 = 8/5 or 1 3/5

y= 1 3/5x

5. k= 400/25 =16

y= 16x

6. k= 63/81 =7/9

y= 7/9x

7. k= 200/300 =2/3

y= 2/3

8. k= 1/2

y= 1/2x

9. k= 48/6 =8

y= 8x

10. k= 10/24 = 5/12

y= 5/12x

y= 4x

2. k= 30/8 = 15/4 or 3 3/4

y=3 3/4x

3. k= .7/.4 = 7/4 or 1 3/4

y= 1 3/4x

4. k= .8/.5 = 8/5 or 1 3/5

y= 1 3/5x

5. k= 400/25 =16

y= 16x

6. k= 63/81 =7/9

y= 7/9x

7. k= 200/300 =2/3

y= 2/3

8. k= 1/2

y= 1/2x

9. k= 48/6 =8

y= 8x

10. k= 10/24 = 5/12

y= 5/12x

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