The graph of a periodic function f is shown below. What is the period of f?
   

What is the midline for f?
y=

What is the amplitude of f?
   

Write a function formula for f. (Enter "theta" for θ.)
f(θ)=

​

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?

You estimate that a baby bird weighs 2 pounds. the actual weight of the baby bird is 1.5 pounds. find the percent error. round your answer to the nearest hundredth of a percent.

If a + b = 28 and a - b = 10, then b =?