01Read the slope and y-intercept from y = mx + bOnce y is alone, read the number multiplying x as the slope and the number added to it as the y-value where the line crosses the y-axis.
02Find where a line crosses the x-axis and the y-axisPut 0 in for y to find where the line crosses the x-axis, and put 0 in for x to find where it crosses the y-axis.
03Write a line’s equation from its slope and one point on itPut the slope in for m and the point’s x-value and y-value into y = mx + b, then solve for b.
04Tell a horizontal line from a vertical line by its equationLook at which letter the equation leaves out, because an equation with no x graphs as a horizontal line and an equation with no y graphs as a vertical line.
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