Determine whether y varies directly with x. If so,
find the constant of variation k and write the
equation
x y
7 14
21 42
63 126
189 378

Respuesta :

Answer:

Yes.

Step-by-step explanation:

They both multiply by 3. K=3

x1=x0*3

x2=x1*3....

y1=y0*3

Y2=y1*3....

Answer:

see explanation

Step-by-step explanation:

If y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation and

k = [tex]\frac{y}{x}[/tex]

Check this ratio for each ordered pair, that is

k = [tex]\frac{14}{7}[/tex] = [tex]\frac{42}{21}[/tex] = [tex]\frac{126}{63}[/tex] = [tex]\frac{378}{189}[/tex] = 2

Thus k = 2 and

y = 2x ← equation of variation