Which relation is a function?
a.

(5, –2), (4, 6), (–3, –2), (0, 4)
b.

(–1, –2), (3, –5), (–1, –5), (2, –2)
c.

(4, 3), (3, 2), (–1, 5), (4, 0)
d.

(–4, –4), (3, –3), (–4, 4), (–3, 3)

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

In a coastal town, the humidity, measured in grams of water per kilogram of air, increases by 43% for every 1 degree celsius increase in temperature. a scientist observes that the humidity on monday morning is 5.75 grams per kilogram. he wants to know how much the temperature must increase for the humidity to reach at least 49.17 grams per kilogram. let t represent the increase in temperature, in degrees celsius, from monday morning's observation. write an inequality to represent the situation, and use it to determine the desired temperature increase.

Caitlin had 402. in her bank account.she withdrew $15.each week to pay for swimming lesson. she now has $237.