Question

The function y=0.18x+0.15 represents the percent y (in decimal form) of battery power remaining x hours after you plug in a laptop computer. Identify and interpret the slope. \

Answer 1

Explanation:

Given

Function is
`y=0.18x+0.15`

where,

`y=\text{Percent of the battery remaining}\\x=\text{time in hours}`

Comparing the given function with the standard slope-intercept form of the equation
`y=mx+c`

Here, before plugging into the laptop, the percentage of battery is

`y=0.18* 0+0.15\\y=0.15\ \text{or}\ 15\%`

The slope of the given function is
`0.18` i.e. in one hour it charges 18% of battery.