Math 8 Unit 3 Vocabulary

In a proportional relationship, the values for one quantity are each multiplied by the same number to get the values for the other quantity. It is the "k" value. This number is called the constant of proportionality.

Slope is also known as _______. (Select all that apply.)

• rate of change

• constant of proportionality

• origin

Match each definition with the correct vocabulary term.

• vertical intercept

• The point where the graph of a line crosses the vertical axis.

• linear relationship

• The relationship in the graph is linear because its graph is a line.

• rate of change

• A linear relationship that shows the amount y changes when x increases by 1.

• solution to an equation

• A pair of values of the variables that make the equation true.

Slope is​ (a)   over ​ (b)   .

• rise
• run
• up
• down
• left
• right
• diagonal
• dilation

6 x 1.5 = 9

4 x 1.5 = 6

5 x 1.5 = 7.5

1.5 is the scale factor.

Match the following.

• congruent

• A _________is a transformation in which each point on a figure moves along a line and changes its distance from a fixed point.

• dilation

• Two figures are ______ if they are the same shape and same size. The figures are identical.

• similar

• Two figures are ______ if they are the same shape, with equivalent angles, but different sizes.

Graph the following points.

(0,0)

(6,4)

Proportional relationships must go through the ​ (a)   and show a ​ (b)   .​

• origin
• straight line
• x-axis
• graph
• y-axis