An app developer projects that he will earn $22.00 for every 8 apps downloaded. write an equation to represent the proportional relationship between the number of apps and the total earnings.

y = ($2.750 / app) . x

Step-by-step explanation:

Let's call

There is a linear relation between x and y, that follows the general form:

y = a . x + b

where

a is the slope

b is the y-intercept

The slope is:

Δy / Δx = $22.00 / 8 app = $2.750 / app

The, we have

y = ($2.750 / app) . x + b

When x = 0 (no app has been sold), y = 0 (no money has been earned).

0 = ($2.750 / app) . 0 + b

b = 0

The equation representing the proportionality between x and y is:

y = ($2.750 / app) . x

The answer is 30.  

The first question are related to how volume changes when you change the size of something. Think of a cube that is 1cm by 1 cm by 1cm. It will have volume of 1*1*1=1cm^3, but if you double the size of the cube, the volume will now be 2*2*2=8 and if you triple it it wll be 3*3*3=27.

Step-by-step explanation:

Hope this helps u