On January 22 in 1943, the town of Spearfish, South Dakota, set the record for the world's fastest
temperature change.
At 7:30 a. m., the temperature was -4°F.
By 7:32 a. m., the temperature was 45 °F.
By 9:00 a. m. the same day, the temperature was 54 °F.
By 9:27 a. m., the temperature was -4 °F.
How many degrees did the temperature change each
minute from 7:30 to 7:32?
Make sure to show whether the change was positive or
negative.

c

step-by-step explanation:

c

step-by-step explanation:

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.