The equation to turn inches into centimeters is Y=2.54x. The X represents the amount of inches you need to find out how many centimeters it is. The Y represents how many centimeters it will equal. This is a linear graph that passes through zero. The slope of this graph is 2.54 and the Y intercept is 0. Each point on the graph represents how many inches are in every centimeter. Using the equation, I found out there are 30.48 centimeters in a foot.
Absolute value means how far the number is from zero on a number line. For example, five is five away from zero. Also, negative five is five away from zero. Negative numbers are the same as positive number when it comes to absolute value.
Some equations don't have an equal sign, therefore you only have to do the problem once because you know if the number is positive or negative. Some equations do have an equals sign, so you have to do the problem twice. One for when it equals a negative number, and another for when it equals a positive number. For example, 5x + 3 = |