I already answered number 1 and 3 I just need 2 4 and 5 that’s it I’ll mark you brilliant AND GIVE EXTRA POINTS!!! 1.How do you know you have a direct variation in the relationship between two quantities?
The ratio.

2.What is constant of proportionality?

3.In a graph where two quantities have a direct variation, what of the line is the constant of proportionality, the constant of variation, the rate of change?
The relationship between two quantities

4.The height of the water in a pool is proportional to the minutes it takes for the pool to fill up. If the height of the water is 2 inches after 5 minutes, what is the constant of proportionality/constant of variation in this situation?

5.Pizzas cost $8 each plus $3 delivery charge as it .

in the table below:
Number of Pizzas 1 2 3 4
Cost $11 $19 $27 $35

Is there a direct variation?
What is the rate of change/slope?