Answer:
see explanation
Explanation:
the equation of a line (linear equation) has slope- intercept form
y = mx + c ( m is the slope (gradient)) and c the y- intercept )
y = 12 + 2x or y = 2x + 12 ← is in slope- intercept form
with gradient m = 2
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the only graphs in linear form are
y =
x and y = 12 - x
the other 2 have an x² term which indicates they are quadratic