What is the constant of proportionality in the equation y =2.5xy=2.5 xy

2.5

Step-by-step explanation:

We know that the constant of proportionality is the ratio between two directly proportional quantities.

The equation of direct variation between two quantities x and y is given by :-

, where k is the constant of proportionality,

The given equation : -

When we compare to the general direct variation equation , we get

hence, the constant of proportionality in the equation  2.5

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !