The app was downloaded 1120 times for Tory to earn $380.
A linear equation is in the form:
y = mx + b;
where y, x are variables, m is the rate of change and b is the initial value of y.
Let y represent the total money paid to download the app x times.
The company pay him $100 plus $0.25 every time the app is downloaded. hence b = 100, m = 0.25
y = 0.25x + 100
For making 380:
380 = 0.25x + 100
280 = 0.25x
x = 1120
Therefore the app was downloaded 1120 times for Tory to earn $380.
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