This is the slope intercept formula (y=mx+b) where: 74 = Y, or the dependent variable x = the independent variable 5 = m, the coefficient, rate and slope line 10 = b, the y intercept
In this case, x = 12.8, so you'd want to use a valid scenario that 12.8 would make sense in. You wouldn't say, for instance: An online t-shirt store charges $10 for shipping and $5 per t-shirt. How many people have to order a t-shirt in order for $74 worth to be sold? Here, x = the people buying the t-shirts. So it wouldn't make sense if 12.8 people ordered t-shirts.
With that said, make the x value reasonable by using things such as measurement units or money.
I hope this helps but if you want me to provide you with a scenario, just ask me.
The decibel level of sound is 50dB greater on a busy street than in a quiet room where the intensity of sound is 10^-10 watt/m^2. The intensity of sound in the busy street is watt/m^2?
