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y = x + 1

x =0123
y =1234

Slider - see what happens to the value of y when you change x
Input box - see the value of y that you get when you put in a value for x

y = x

y = 2x

y = x + 1

y = 2x + 1

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

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