maths.com Linear Graphs y = x

y = x

x =	0	1	2	3
y =	0	1	2	3

The x values are plotted on the horizontal axis

The y values are plotted on the vertical axis

y = gradient × x
y = mx
y = ax

y = x + intercept
y = x + c
y = x + b

y = gradient × x + intercept
y = mx + c
y = mx + b
y = ax + b