Question

Yuson must complete 210 min of community service. She does 30 min each day. Which linear equation represents the number of minutes Yuson has left after x days?

Answer 1

y = -30x + 210

Explanation:

Answer 2

`y=-30x+210`

Explanation:

Let

x -----> the number of days

y ----> the number of minutes Yuson has left

we know that

The linear equation in slope intercept form is equal to

`y=mx+b`

where

m is the slope

b is the y-coordinate of the y-intercept (initial value)

In this problem we have

The slope is equal to

`m=-30(min)/(day)` ----> is negative because is a decreasing function

`b=210\ min` ----> initial value

substitute the values

`y=-30x+210`