Maths

>

GCSE

Rates of Change

Question

How do you find the rate of change?

1 year ago

·

165 Replies

·

5833 views

V

Vickie Shanahan


165 Answers

B
Behrad

Rate of Change = (Change in Output) / (Change in Input)

  • Change in Output: This refers to the difference between the final and initial values of the quantity you're measuring (often denoted by y).
  • Change in Input: This refers to the difference between the final and initial values of the independent variable (often denoted by x).


I
Iliirjan

The rate of change in measured the change in Y over the change in X

Abdul M Profile Picture
Abdul M Verified Sherpa Tutor ✓

I am a 3rd yr medical student at the University of Cambridge.

2 reviews

Difference divided by the time.

In terms of a graph, this will be the change in the y-axis divided by the change in the x-axis (aka slope).

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.
Loubna  Profile Picture
Loubna Verified Sherpa Tutor ✓

Your bridge to Maths & Physics success. Let's ace it together!

1 reviews

The rate of change can be found by calculating the difference in the values of a quantity over a certain period of time or another variable. It is often calculated using the formula:


Rate of change = (Change in quantity) / (Change in time or another variable)


For example, to find the rate of change of distance with respect to time, you would divide the change in distance by the change in time. This gives you the speed or velocity.

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.
P
Paul Hunt

This is easier to work out from a graph, the rate of change is the gradient of the line - the change in y divided by the change in x. However, you might not have time in exam conditions to draw a graph when it's not asked of you, so I would suggest picking two points of the data - ignoring outliers if there are any. Calculate the difference between them by taking them away from each other, then divide that by the difference in time between them. This will give you the rate of change.

Vashisht K Profile Picture
Vashisht K Verified Sherpa Tutor ✓

6 years teaching STEM up to Degree level. Master's Student at KCL

8 reviews

In a graph of a value vs time, it would be the gradient. Otherwise simply divide the difference in any particular value by the time taken.

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.
Dr M Profile Picture
Dr M Verified Sherpa Tutor ✓

An experienced tutor for science subjects and competitive exams

If you take the change in Y values and divide that with the change in X-values the result will be a rate of change,

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.
S
Sonya Pervez

The rate of change (ROC) is how much the value of something changes over a period of time and it is given in percentage terms.


To find this you first calculate the change in "Y" values (or the change in an outcome variable) divided by the change in "X" values (or the change in input variables).


So if my tutoring time increases from 3 hours in week 1 to 16 hours in week 2 and my income increases from £45 per week to £240 per week, Y values are my income and X values are the work hours I put in. r

To calculate the ROC I would do the following.


(240 - 45) / (16 - 3) = 195 / 13 = 15% rate of change in my earnings between week 1 and week 2.

Emanuel Profile Picture
Emanuel Verified Sherpa Tutor ✓

Experienced and enthusiastic Maths Tutor and Maths teacher of GCSE and

You would have to differentiate

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.
S
Stavros Savva

Divide the change of one variable with the change of the other variable

E
Emmanuel John

The average rate of change is a measurement that provides insight in a variety of applications; Finance, accounting, engineering etc.


In the simplest form, it is calculated with this algebraic formula - (y1-y2)/(x1-x2) where y1,y2,x1 and x2 are diffent points in the x and y axis on a graph.

M
Milton Tom

Frays of change is how much x. Ganges w time or another variable . So this can be done by working out the gradient of a graph or differentiating If it is an expression

D
Dewain Sewell

Distance traveled divided by time it takes. On a graph that would be calculating the difference in the change in y and the change in x

F
Farooq

The rate of change (ROC) is the speed at which a variable changes over a specific period of time

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

Elizabeth Profile Picture
Elizabeth Verified Sherpa Tutor ✓

Qualified Teacher to help you excel.

4 reviews

divide the change in y-values by the change in x-values

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.

Think you can help?

More Maths GCSE Questions
Sherpa Badge

Need a GCSE Maths tutor?

Get started with a free online introductions with an experienced and qualified online tutor on Sherpa.

Find a GCSE Maths Tutor