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You CAN'T determine whether two numbers are proportional, just by looking at one number from each set.
you divide the numerator by the denominator, if you get the same to the other fractions, it is proportional. Another solution is if you reduce the two fractions to simplest form and they are the same, they are also proportional.
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In the case of polygons (basically the simplest case), you need to determine that corresponding sides are proportional (for example, all sides in figure "B" are twice as large as the corresponding sides in figure "A"), and that corresponding angles are equal.
look at the ratios and multiply
If the points lie on a straight line through the origin, the two variables are in direct proportion.
A proportional relationship is of the form y = kx where k is a constant. This can be rearranged to give: y = kx → k = y/x If the relationship in a table between to variables is a proportional one, then divide the elements of one column by the corresponding elements of the other column; if the result of each division is the same value, then the data is in a proportional relationship. If the data in the table is measured data, then the data is likely to be rounded, so the divisions also need to be rounded (to the appropriate degree).
You CAN'T determine whether two numbers are proportional, just by looking at one number from each set.
you divide the numerator by the denominator, if you get the same to the other fractions, it is proportional. Another solution is if you reduce the two fractions to simplest form and they are the same, they are also proportional.
Scatter chart
scatter chart
Words such as "proportional to" "increases as" "decreases as", usually give an indication of a linear relation. If there are words like "Square" "power" "inversely proportional" then most likely not linear.
"Dependent" does not say whether the relationship is directly proportional or indirectly proportional; or some other function of the number of cars.
The fractions are proportional and their cross products are equal
In the case of polygons (basically the simplest case), you need to determine that corresponding sides are proportional (for example, all sides in figure "B" are twice as large as the corresponding sides in figure "A"), and that corresponding angles are equal.
You need to know the basic relationship between the variables: whether they are directly of inversely proportional to each other - or to a power of the other. Also, you need one scenario for which you know the values of both variables.So suppose you have 2 variables A and B and that A is directly proportional to the xth power of B where x is a known non-zero number. [If the relationship is inverse, then x will be negative.]Then A varies as B^x or A = k*B^xThe nature of the relationship gives you the value of x, and the given scenario gives you A and B. Therefore, in the equation A = k*B^x, the only unknown is k and so you can determine its value.