Back to the full dot-point answer
SingaporeMathsQuick questions
Functions and Graphs
Quick questions on Linear graphs and gradient explained: N(A)-Level Mathematics Functions and Graphs
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the equation of a straight line?Show answer
Every straight line (except a vertical one) can be written as:
What is gradient?Show answer
The gradient measures how steep the line is - how much changes for each unit increase in :
What is the y-intercept?Show answer
The -intercept is the value of where the line meets the -axis, that is when . In a real context it often means a starting value, such as a fixed fee before any usage is added.
What is reading values from a graph?Show answer
Once a line is drawn, you can read off a value for any (or the reverse) by going up from the axis to the line and across. This is how travel and conversion graphs are used.
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.