# Math

posted by .

I have been stuck on this problem for a while need help on it and soon. It's functions.

X Rule Y

10 65
30 45
50 25
70 5
I can't find the rule

• Math -

Did you not notice that for every increase of 20 in the x's there is a decrease of 20 in the y's
so the slope is (45-65)/(30-10) = -1

so y = -x + b
using x=10, y = 65
65 = -10 + b
b = 75

y = -x + 75

## Similar Questions

1. ### Math - Calculus Question.

hey can someone explain to me the relationship between the chain rule and implicit differentiation?
2. ### Calculus

How do I use the chain rule to find the derivative of square root(1-x^2) also, are there any general hints or tips for determining when the chain rule and product or quotient rule should be used?
3. ### English

We have been given a list of words and have to write the plural of them. I have found the answer to each of the words but now have to write rule for each. I know that words ending in ch, x, s or s-like sounds will all end in es. I …
4. ### Algebra

i am stuck on this one math problem. The question is to write a rule for the pattern (it is a section on sequences) The pattern is -5,10,-15,20,-25. What is the rule?
5. ### calculus

I have been asked to solve this two different ways. The first way is to use the chain rule and then simplify (which I have already done properly), and the second way is to simplify and then differentiate (not necessarily with the chain …
6. ### Math

I Have to answer the game, "what's my rule" I've tried everything. I do not know if the teacher made a mistake in the problem. When x=1, y=3 x=2, y=6 x=3,y=12 x=4, y=24 I see that Y is doubling, but I need a rule to use with variable …
7. ### Maths

Please I need help.Iam stuck with this question.Using sine and cosine rule: A rocket launced vertically from L is observed from A. Soon after launch when at position M its angle of elevation is 25 degree. After it climbs 4000m from …
8. ### GUESS MY RULE WITH LETTERS

I CAN`T FIND OUT WHAT THE RULE IS I KNOW THAT THE LETTERS THAT ARE IN THE RULE ALL HAVE STRAIGHT LINES N THE ONES THAT DO NOT FIT ALL HAVE CURVES I JUST NEE TO KNOW WHAT THE RULE IS PLEASE SOMEONE HELP ME
9. ### Calculus

Match the rule with the title: ____ 3. d/dx [f(x)/g(x) ]=(g(x) f^' (x)-f(x) g^' (x))/[g(x)]^2 ____ 4. d/dx [f(g(x))]=f^' (g(x))∙g'(x) ____ 5. d/dx [f(x)∙g(x)]= f(x) g^' (x)+g(x) f^' (x) ____ 6.d/dx [x]=1 ____ 7. d/dx [f(x)+g(x)]= …
10. ### Physics

I really need help with this question, i've found that a texbook said fourth hand, but I don't know if that's a thing Which rule is used to find the direction of force produced by electromagnetic induction?

More Similar Questions