Yis 5 when x is 2.5, and y varies directly with x.. find y when x is 10.. 5. 7.5. 12.5. 20

Most of the information's required for solving this problem is already given in the question. Let us write them down first and then concentrate on the problem in hand.

When y = 5, then x = 2.5
So
y = kx
5 =2.5k
k = 2
Now, when x = 10, then
y = kx
  = 2 * 10
  = 20
From the above deduction, we can conclude that the correct option among all the options that are given in the question is the last option.

Hi! mark me brainliest if i : )y = 0.213x – 352.0    represents this linear model shown in the data table.plug in the values of x into the equation for a double check.let's try 1980.y = 0.213(1980) – 352.0y = 69.74which is closest to the 70.1 whereas other options do not satisfy the condition. 

Two because two of one thing is two.