A curve graph

What is the difference between a straight line and a curve graph?

Can one graph consist of a straight line graph and a curve graph?

If yes, can they ever intersect?

How can one determine by calculation if these two graphs intersect?

Intersection of two straight lines

Can a graph consist of more than one straight lines?

If yes, why would someone put more than one straight line graphs on the same graph?

In the event that the straight lines intersect, what does this signify?

How can one calculate that point to verify that the graph is accurate?

Gradient and intercepts

How do you find the gradient of a straight line?

What is the use of finding gradient?

How can you explain gradient so that the ratio of change in y over change in x is not mixed up?

What is the purpose of finding y-intercept?

How do find the y-intercept?

What is the meaning of intercept?

A graph commonly consists of two axes called the x-axis (horizontal) and y-axis (vertical). Each axis corresponds to one variable. This variable represent something that a human can relate to for example the axes can be labelled with different names, such as velocity, time, height, temperature, price or quantity.
The place where the two axes intersect is called the origin. The origin is also identified as the point (0,0). Parts of a graph
- x-axis

- y-axis

- origin

A point on a graph represents a relationship. Each point is defined by a pair of numbers containing two co-ordinates (x and y). A co-ordinate is one of a set of numbers used to identify the location of a point on a graph. The co-ordinate is measured from the origin. First the x co-ordinate is given which states movement to the left and to the right. Second the y co-ordinate is given which states movement up and down.