Question

Item 14 You develop an app to help students complete their homework. To earn money, you sell advertising space on the app’s main screen. An advertiser pays you $20 per month and an additional $0.005 each time the app is opened. Graph the linear equation that represents your monthly income y (in dollars) when the app is opened x times.

Answer 1

See attached diagram

Explanation:

Let x be the number of times the app is opened and y be your monthly income (in dollars).

If an advertiser pays you $0.005 each time the app is opened, then he pays you $0.005x for all times the app is opened. Since an advertiser pays you $20 per month, then the total income is

y=20+0.005x.

Plot this line on the coordinate plane (see attached diagram).

Answer 2

y ⇒⇒⇒ monthly income
x ⇒⇒⇒ number of times app is opened

$20 per month and an additional $0.005 each time the app is opened

∴ y = 0.005 x + 20

The attached figure represents the graph of y