1. julie is at the store buying groceries. she needs to get a quart of orange juice and some peaches. the quart of orange juice costs $2.25 and the peaches are $0.75 each. the function f(x) = 0.75x + 2.25 represents julie's expenses at the grocery store. what do the f(x) and the x represent? a: f(x) represents the number of items purchased at the grocery store; x represents the number of peaches purchased

b: f(x) represents the total cost of the grocery bill; x represents the cost per peach

c: f(x) represents the number of items purchased at the grocery store; x represents the cost per peach

d: f(x) represents the total cost of the groceries; x represents the number of peaches purchased 2. which of the following exponential functions goes through the points (1, 6) and (2, 12)? f(x) = 3(2)x
f(x) = 2(3)x
f(x) = 3(2)−x
f(x) = 2(3)−x