A mobile phone is put to use when the batterypower is 100%. The percent of battery power ‘y’(in decimal) remaining after using the mobilephone for x hours is assumed as y = −0.25x +1

A mobile phone is put to use when the battery
power is 100%. The percent of battery power ‘y’
(in decimal) remaining after using the mobile
phone for x hours is assumed as y = −0.25x +1

Match the items on the right to the items on the left.

Draw a graph of the equation

Find the number of hours elapsed if the
battery power is 40%.

How much time does it take so that the
battery has no power?