Question

The function y=−0.25x+0.55 represents the percent y (in decimal form) of battery power remaining x hours after you turn on a laptop computer.
a. Identify and interpret the x-intercept
b. Identify and interpret the y-intercept.

Answer 1

Answer: a is 2.2, b is 0.55
Explanation:
To find the x intercept, put 0 instead of y,
hence,
0=-0.25x+0.55
-0.25x=-0.55
x=2.2
To find y intercept put 0 instead of x,
so,
y=-0.25*0+0.55
y=0+0.55
y=0.55