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math script

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Nov 09.2003

Hello
I am looking for a math script: a+b*x=y
where the user can choose x between 1-100 and get y result
I am studying at KTH in Stockhol Sweden and I am working on a chapter on functions in a math book for students aged 15.
Nils

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JavaScript

3 Comments(s) ↴

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@NayiasNov 09.2003 — <head>

<script language="JavaScript">

function calculate()

{

var x= prompt("Type a numbet between 1 and 100","0");

if(x>100 || x<0){


alert("invalid input"); calculate()

}

var a = 10;

var b = 20;

var y = a+b*x;

document.YourFormName.ynumber.value=y;

}

</script>

</head>

<body>

<form name="YourFormName">

<input type="button" value="Click her to choose an x number" onClick="calculate()"><br>

a=10<br>

b=20<br>

a+b*x=<br>

<input type="tekst" name="ynumber">

</form>

</body>


is that what you need?
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@ShampieNov 10.2003 — Just a small reminder, as in math rules:

a+b*x=y b*x will be calculated first then a will be added.

(a+b)*x = y a and b will be added and multiplied by x.

if you wish to use a method to round the number to a full number use the Math.round(a+b*x) function.
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@NilspauthorNov 14.2003 — Hello

That was what I was looking for, thanks!

As the script is for the student to learn how to use functions, there is an additional script I need:

The previous script has generated an answer: a Y value, the student has to do the calculations and come up with the answer.

I need a script that when the answer frrom the student matches the correct Y value generated by the program the value is true, otherwise false and the student has to try again...

Regards Nils
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