Thursday

October 23, 2014

October 23, 2014

Posted by **KIRA** on Wednesday, February 20, 2008 at 8:44pm.

Y=23]24]25]26]27

WHAT IS THE VALUE OF Y WHEN X IS 68??

IF Y=X-19, WHAT IS THE VALUE OF X WHEN Y= 34

- MATH -
**Guido**, Wednesday, February 20, 2008 at 8:54pmQuestion 1:

92 - 4 = 88; y = 22

88 - 4 = 84; y = 21

84 - 4 = 80; y = 20

80 - 4 = 76; y = 19

76 - 4 = 72; y = 18

72 - 4 = 68; y = 17

What's the answer?

When x = 68, y = 17.

====================

For question 2:

IF Y = X-19, WHAT IS THE VALUE OF X WHEN Y= 34.

Replace Y with 34 and solve for x.

34 = X - 19

34 + 19 = X

53 = X

Done!

- MATH -
**Damon**, Wednesday, February 20, 2008 at 9:08pmX= 92]96]100]104]108

differences

4, 4, 4, 4

Y=23]24]25]26]27

differences

1, 1, 1, 1

when doing this type of problem, make table of change in x and change in y.

if the ratio of change in y over change in x is constant, we have a straight line.

y = m x + b

If not, make another line, the differences of differences.

if that ratio is constant, you have a parabola.

y = a x^2 + b x + c

etc. That will usually work

Anyway, here we have y = m x + b

put in two points to solve for m and b and you have everything.

we can see from our table that m = change in y / change in x = 1/4

so

y = (1/4) x + b

put in a point (92,23)

23 = (1/4)(92) + b

b = 0 remarkable

SO

y = (1/4) x

so if x = 68, then y = 68/4 = 17

**Answer this Question**

**Related Questions**

math - Many grocery stores have installed self checkout systems. Below is the ...

Algebra - What is the value of x such that the list 100, 102, 104, x, x, 106, ...

math - Male: 60,63,65,70,66,80,85,73,79,80,83,85,81,76, 77,90,91,88,78,92 ...

MATH Please help me - Male: 60,63,65,70,66,80,85,73,79,80,83,85,81,76, 77,90,91,...

Math (stastiscs) - Male: 60,63,65,70,66,80,85,73,79,80,83,85,81,76, 77,90,91,88,...

Math - weighted average? - I need to create some type of formula that will allow...

math - Tina solved for the decimal value 0f (3/5*18) and got an answer of 5.4. ...

Economics/Statistics - 1. Assume that q and z are two random variables that are ...

math - The value of a house decreased from $108,000 to $82,000. Determine the ...

math - A share of stock worth 100 dollars loses 90% of its value. Then, over ...