you must solve for y, using the equatin y=mx+b
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the slope formula is y=mx+b slope-intercept form of an equation of a line. where m=slope and b=the y-intercept
y=-4
the slope is 0
the slope is the 'm' in y=mx+b so even if the points aren't given, if there is an equation, then you can find the slope. for example, if you have an equation like this: y=2x+5 the slope is 2 and the y-intercept is 5.
The slope is the gradient which is y2-y1/x2-x1 To find the y int you set the equation of the line equal to zero i think :/