Skip to content
MathsGenie logo
Quick links
Open app

Course home

  1. A Level
  3. Maths AQA
  5. Question bank

1.5.3 Quadratic functions

EasyMedium
123456789101112131415161718192021
Question 16

This model can be used to predict the fuel consumption of a car, y y\,y miles per gallon, for a car travelling at x x\,x miles per hour.

y=55−0.015(x−50)2 y = 55 - 0.015(x - 50)^2 y=55−0.015(x−50)2
a.

Calculate the fuel consumption, in miles per gallon, of a car travelling at 70 miles per hour.

[2]
b.

Deduce the speed at which the car has the greatest fuel efficiency.

[2]
c.

State, giving reasons, the limitation on the values of xxx

[3]

1.5.3 Quadratic functions Questions

  1. A Level
  2. /Maths
  3. /1.5.3 Quadratic functions