Unit 1 Review

A number, without a variable, added or subtracted in an equation

A letter or symbol that represents a number.

Solve by graphing.

You bought a magazine for $5 and four erasers.You spent a total of $25. How much is an eraser?

In the equation y = kx, the letter k represent the......

y varies directly with x.  If y = 75 when x = 25, find x when y = 27.

Two or more terms attached by mathematical operations

Solve by graphing

Solve: ab – d = c      For(b)

Solve:  5p − 14 = 8 p + 4

A mathematical statement with an equal sign

Four less than twice a number is 16.  What is the number?

Is 2x + 3y = 0 an example of direct variation?

Solve: 3w + 2 – w = -4

Solve:  -65 = 8x + 7 

y varies directly with x. If y = −4 when x = 2, find y when x = −6.

To multiply by the number on the outside of the parentheses

If 3n - 6 = 9, what is the value of 3n - 4?

Is the relationship shown in the graph a direct variation?

Solve by graphing