Forums Leaving Cert Maths calculus

  • This topic is empty.
Viewing 3 reply threads
  • Author
    • #234

      :graph function y=(f(x))

    • #12558

      graph function y=(f(x))

    • #12559

      Pick some values for x e.g. -2 -1 0 1 2.
      Calculate f(x) for each value; this gives you a pair of numbers x f(x).
      f(x) is y so you can plot each pair as (x y) points.

      There must be more in the original question — whats f(x) given as?
      For example

    • #12560

      Let's say you want to graph the function 5x-7y+10=0.

      The steps are as follows:

      Set up your graph. Draw in your X & Y lines and divide them.

      Choose any number for X. Let's say we choose 1 here. Then we get 5(1)-7y+10=0, i.e that 15=7y. So y=15/7. So one point is (1,15/7).

      Repeat the above for different valuse of x. Let's say we choose 5 this time. Then we get 5(5)-7y+10=0, i.e 7y=35. Therefore y=5. So another point is (5,5).

      After getting a number of points, join them up as carefully as you can. You now has graphed your function/equation.

Viewing 3 reply threads
  • You must be logged in to reply to this topic.