Part of the population of 7000 oak in a wildlife preserve is infected with a parasite. A random sample of 50 elk shows that four of them are infection. How many elks are infected?

Answer is 560

Refer below.

Step-by-step explanation:

4/50=x/7000

50x=28000

X=560

answer: a. 74

step-by-step explanation:

it shows divided evenly, so add the 37+37 = 74

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.