## How do you find the relationship between two quantities?

Two quantities have a proportional relationship if they can be expressed in the general form y = kx, where k is the constant of proportionality. In other words, these quantities always maintain the same ratio. That is, when you divide any pair of the two values, you always get the same number k.

## Is there a proportional relationship between X and Y explain?

(Some textbooks describe a proportional relationship by saying that ” y varies proportionally with x ” or that ” y is directly proportional to x .”) This means that as x increases, y increases and as x decreases, y decreases-and that the ratio between them always stays the same.

## How do you know if a relationship between two quantities is not proportional?

The graph of a proportional relationship is a line through the origin. When ratios between quantities are not constant, a relationship may be linear but not proportional and the graph does not pass through the origin. Example : Explain why the relationship between number of tickets and total cost is not proportional.

## How is a proportional relationship represented in a table?

If you can draw a straight line through all three points and the line passes through the origin, (0, 0), the ordered pairs represent a proportional relationship. Solution The points on the graph represent a proportional relationship. Show that the ordered pairs in the table represent a proportional relationship.

## Does a proportional relationship always pass through the origin?

Directly proportional relationships always pass through the origin (0,0). There are other linear relationships that do not pass through the origin.

## Does the equation y 4x represent a proportional relationship?

So yes it does equal a proportional relationship.

## Does a proportional relationship have to be a straight line?

Because the two variables always change by the same multiple, the graph of a proportional relationship is always: a straight line (no curves, bends, corners, or open spots) a line that passes through the origin (the 0,0 intersection) not vertical or horizontal (doesn’t look like a floor or a wall)

## What terms are equivalent to the slope in a proportional relationship?

For a proportional situation, the unit rate is the same as the slope of the line that represents the proportional data.

## Is slope a measure of change?

Slope measures the rate of change in the dependent variable as the independent variable changes. Slope means that a unit change in x, the independent variable will result in a change in y by the amount of b. slope = change in y/change in x = rise/run. Slope shows both steepness and direction.

## Is slope a proportional relationship?

Students determine slope as a rate of change in a proportional relationship between two quantities; write equations in the form y = mx to represent a proportional relationship; and graph lines representing a proportional relationship using slope and an ordered pair or an equation.

## How do you convert Y intercept to standard form?

To convert from slope intercept form y = mx + b to standard form Ax + By + C = 0, let m = A/B, collect all terms on the left side of the equation and multiply by the denominator B to get rid of the fraction.

## Is C the Y intercept in standard form?

Standard form is another way to write slope-intercept form (as opposed to y=mx+b). It is written as Ax+By=C. You can also change slope-intercept form to standard form like this: Y=-3/2x+3. Next, you isolate the y-intercept(in this case it is 3) like this: Add 3/2x to each side of the equation to get this: 3/2x+y=3.