20 points plus brainliest
For each graph, decide whether or not it is a function.

Is a deceasing linear model or an exponential decay model likely to be a better fit for the data about remembering? ?

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75