Equations in Two Variables

Equations in two variables review

By Debbie Motsinger

Multiple Choice

Find the constant of proportionality in the graph.

• 3

• -3

• 1/3

• - 1/3

Multiple Choice

Find the constant of proportionality.

• 1/2

• 2

• -1/2

• -2

Fill in the Blank

Find the constant of proportionality in the table.

Multiple Choice

Does the table show a proportional relationship between x and y?

Multiple Choice

Does the table show a proportional relationship between x and y?

Slope = rise over run. Find two points on the line.

• Count up or down (rise)

• Count across (run)

​A line that goes up to the right has a positive slope.

A line that goes down to the right has a negative slope.​

Find constant rate of chage (slope)

​

Multiple Choice

• $$\frac{3}{4}$$  

• $$\frac{4}{3}$$  

• $$-\frac{3}{4}$$  

• $$-\frac{4}{3}$$  

Multiple Choice

Find the slope of the line.

• $$\frac{9}{7}$$  

• $$-\frac{9}{7}$$  

• $$\frac{7}{9}$$  

• $$-\frac{7}{9}$$  

Slope from two ordered pairs.

Multiple Choice

Find the slope of the line passing through the two given points.

• $$\frac{4}{9}$$  

• $$-\frac{4}{9}$$  

• $$\frac{9}{4}$$  

• $$-\frac{9}{4}$$  

Multiple Choice

Find the slope of the line passing through the two given points.

• $$2$$  

• $$\frac{1}{2}$$  

• $$-2$$  

• $$-\frac{1}{2}$$  

Multiple Choice

What is the constant of variation?

• 4 eggs per cake

• 0.25 eggs per cake

• 2 eggs per cake

• 10 eggs per cake

Multiple Choice

Which graph shows direct variation?

• a

• b

• c

• all of the graphs

Multiple Choice

Find y.

• 0.5

• 32

• 4

• 8

Multiple Choice

Find x.

• 7

• 6

• 2

• 0.5

Multiple Choice

a. How much will she earn for working 10 hours?

b. What is the direct variation equation?

• A. $2.85

  B. m = 28.50h

• A. $2.10

  B. m = 2.10h

• A. $47.50

  B. m = 4.75h

• A. $0.21

  B. m = 0.21h