The rule for a line whose gradient is
-4 and y-intercept = 8 is:

The rule for a line whose gradient is -4 and y-intercept = 8 is

Step-by-step explanation:

Equation of line slope intercept form is

 ------------- (1)

Where m is slope or gradient and b is y-intercept

Here

Substituting values in equation (1)

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Step-by-step explanation:

Given

Required

Draw and label the circle

The equation of a circle is:

Where:

So, we have:

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