Ax+By=C This is the standard form of a linear equation.
This can be rearranged to
By = -Ax + C
or further
y = (- A/B)x + C/B
Where '-A/B' is the slope/gradient and 'C/B' is a constant - the point where the line intersects the y-axis.
NB Curved lines have either 'x' or 'y' raised to a power/index.
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It is a straight line equation that can be simplified to: y = 3x-9
I need step by step on my graphic calculator on how to write an equation
There is not one, but several, standard forms for the equation of a line: for example, the slope-intercept form (which is basically the equation, solved for variable "y"); the form Ax + By + c = 0; and others.
The standard form is Ax + By = C. The slope of the line is (9-7)/(-2 - (-2)) or 2/0. This indicates that this is a vertical line whose x intercept is -2. The equation of the line is then x = -2.
An equation such as y = mx + c is said to be in standard form. From such an equation, Gradient = coefficient of x = 3