It's a comparison of 2 different things in a ratio. For example, when you take $24.00 for 5 pounds. You set it up as $24.00 over 5 pounds. You then divide those 2 and then you get $8.00 for 1 pound. You get it now?
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A rate of change in a variable Y, if not further qualified, is the change in Y for a unit change in time. However, the rate of change may be defined in terms of a unit change in some other variable (X). In graphical terms, the rate of change for a straight line is its gradient whereas for a curve, the rate of change at a point is the gradient of the tangent to the curve (if a tangent can be defined).
A unit rate is a ratio where the second component is equal to 1.
A rate that has 1 unit as it's second term -Ex-5lbs at $1.45 per lb.(price per pound would stay same regardless of how many you buy). UNIT RATE
yes
unit rates are simple ex 3 candies cost 75 cents divide 75 by three the unit rate equals 25 cents