ATAR Notes: Forum

HSC Stuff => HSC Maths Stuff => HSC Subjects + Help => HSC Standard Mathematics => Topic started by: Sarahxx16 on October 21, 2019, 10:02:16 am

Title: equation
Post by: Sarahxx16 on October 21, 2019, 10:02:16 am
If you are given a graph, how do you find the equation of it ?
Title: Re: equation
Post by: fun_jirachi on October 21, 2019, 10:14:34 am
Hey there! :)

That's a very broad question; do you have any specific examples?

For example:
If a graph is just a line, it's possible to use the formulas y=mx+b and y-y1=m(x-x1) from intercepts/points on the graph.
If the graph is a parabola, you can use formulas like ax2+bx+c, (x-a)(x-b) (from x-intercepts), (x-h)2+k (from the vertex of the parabola).
There are plenty more examples but the question is actually so broad it's impossible to cover them all unless you had a specific question in mind :)

Hope this helps! :D