Writing Linear Equations

Give the equation for a VERTICAL line through (4,6).

• x = 6

• x = 4

• y = 4

• y = 6

Give the equation for a HORIZONTAL line through (4,6).

• x = 6

• x = 4

• y = 4

• y = 6

Write an equation with a slope of 2 and a y-intercept of -5.

• y = 2x - 5

• y = 2 - 5x

• y = 5x + 2

• 2x + y = 5

Write an equation of a line going through (6, 8) with a slope of -7.

• y + 6 = -7(x + 8)

• y +8 = 7(x + 6)

• y - 8 = -7(x - 6)

• y - 8 = 7x + 6

Check all that is true about the following equation:

2x - 5y = 40

• x-intercept = 20

• y-intercept = 8

• x-intercept = 2

• y-intercept = -5

• The line passes through the origin.

Rewrite the equation in SLOPE-INTERCEPT form:

 $y-5=\frac{1}{2}\left(x+8\right)$  

•  $y=\frac{1}{2}x+9$  

•  $y=\frac{1}{2}x+3$  

•  $y=\frac{1}{2}x+13$  

•  $y=\frac{1}{2}x-1$  

What is the slope of a horizontal line?

• positive

• negative

• zero

• undefined

Rewrite the equation in STANDARD form:

 $y=\frac{2}{3}x+4$  

•  $2x+y=4$  

•  $-2x+3y=12$  

•  $-2x+y=12$  

•  $3x+4y=2$  

What is slope?

(Select all that apply)

•  $\frac{rise}{run}$  

•  $\frac{y_2-y_1}{x_2-x_1}$  

• measure of a line's steepness

•  $"m"$