graphing functions

Forums Leaving Cert Maths graphing functions

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    • #12547

      worked examples?

    • #229

      :worked examples?

    • #12548

      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.

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