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How do changes to the coefficient of x affect the graph y = f(x) as opposed to changes to the coefficient of f(x)?

If you change the coefficient of x, it will stretch or squash the graph in the x direction by the reciprocal of the factor that the coefficient is changed by. If you change the coefficient of f(x), then the ...
JB
Answered by Jesper B. • Maths tutor
9660 Views

How do you solve simultaneous equations

So let's use 2x + 5y = 11 and 3x - 5y = 4 as our example.In these equations we have 2 unknown variables, x and y which we are trying to work out. The numbers in-front of the letters are the amount of times w...
SC
Answered by Siobhan C. • Maths tutor
4900 Views

Find the gradient of the curve with the equation y = x^3+7x^2+1 at x=2

The equation of the line is y=x 3 +7x 2 +1To find the equation for the gradient of the line, we need to differentiateDifferentiating gives us dy/dx = 3x 2 +14xWe can now find the gradient of the curve at any...
CR
Answered by Charlotte R. • Maths tutor
4764 Views

Megan buys a car for £7,700 plus 20% VAT. She pays a deposit for the car and then pays the rest in 12 equal instalments of £642.50. How much did Megan pay as a deposit?

7700 x 1.2 = 9240 (total cost of car)12 x 642.5 = 7710 (total cost of instalments)9240 - 7710 = 1530Answer = £1,530
CD
Answered by Charles D. • Maths tutor
3448 Views

dy/dx of 2x (3x - 1)^5

use the product rule as well as chain rule. We require the product rule when there is are variables both outside and inside the brackets. The chain rule is only utilised when we have one variable.
AT
Answered by Amir T. • Maths tutor
7048 Views