MATHS QUESTION WOULD REALLY LIKE SOMEONE TO HELP!!

Question

Okay this is for an assignment & i completly dont get it, if someone would be able to make it sound easy.....i will give double pointss.

Okay the question is this:

Put this equation in to a table: y = 3(square root of) x

x 0 o.5 1 1.5 2 2.5 3

y 0 2.1 3 3.7 4.2 4.7 5.2

^^ Thats the graph answers

Then it says use this table to estimate a value for (square root of) 18 & it also says clearly show how you arrived at the answer

I dont know what the equation would have in it or how to go about it

I am really lost with this question!!!!

Any help would be appreciatedd!!!

Answer 1

y=3 der

just do the math i get it but i you to figure it out yourself  

Answer 2

Im not a nerd but it is

You want the √18 so you do surds:

18 = 9 x 2 so √18 = √(9 x 2)

Use the distributive law:

√(9 x 2) = √9 x √2

√9 = 3 so:

√9 x √2 = 3√2

The table's equation is y = 3√x and you want 3√2 (√18)

Substitute x with 2 and in the table shown, you get 4.2

Answer 3

i'm so sorry i just finished the 5th grade :( don't worry, i'll help you when i reach high school...

Answer 4

Start by looking at the just the question and ignoring all of the wordy details.  

Question:  Estimate √(18)

You know that 18 = 9*2 (where * means times).  Then you can rewrite the question as

Question:  Estimate √(9*2)

But √(9*2) = √(9)*√(2) so the question is really

Question:  Estimate √(9)*√(2)

Since 9 = 3*3, then you know that √(9) = 3.  So the question is

Question:  Estimate 3√(2)

Now this has the form y = 3√(x) from the equation they gave you.  All you need to do is look at the table entry for the y value when x = 2.  This should be y = 4.2 so 4.2 is the estimate of √(18).

Hope this helps you!

Answer 5

You want the √18 so you do surds:

18 = 9 x 2 so √18 = √(9 x 2)

Use the distributive law:

√(9 x 2) = √9 x √2

√9 = 3 so:

√9 x √2 = 3√2

The table's equation is y = 3√x and you want 3√2  (√18)

Substitute x with 2 and in the table shown, you get 4.2