Writing the equation of a straight line

Which variable represents the y-intercept in the linear equation y = mx + b?

• y

• x

• m

• b

Identify the y-intercept in the following equation:

 $2x+y=6$  

• 6

• 2

• -2x

• -2

Which equation represents the slope-intercept form?

•  $y=mx+b$  

•  $y-y_1=m\left(x-x_1\right)$  

•  $Ax+By=C$  

•  $m=\frac{y_2-y_1}{x_2-x_1}$  

What is the y-intercept

y= -2x+7

• -2

• 7

• 2

• 0

If m = 1/2 and b = -4, what is the correct equation in slope-intercept form?

• y=1/2x+4
• y=1/2x-4
• y=1/2-4
• y=4x+1/2

Write an equation in slope intercept form that describes this linear function.

Write an equation for a line in slope-intercept form with a slope of  $-\frac{1}{2}$  and a y-intercept of  $10$  .

•  $y=-\frac{1}{2}x+10$  

•  $y=10x-\frac{1}{2}$  

•  $-\frac{1}{2}x+10y=5$  

•  $y-\frac{1}{2}=10\left(x-\frac{1}{2}\right)$  

 $y\ =\ x\ -\ \frac{3}{4}$  
Y-intercept is

•  $\frac{3}{4}$  
  

• 1

• -1

•  $-\frac{3}{4}$  
  

Answer explanation

Y-intercept is always a constant.

is your equation y=mx+b what does m stand for

• x coordinate

• y coordinate

• y-intercept

• slope

When converting the equation

2x + 4y = 8

into slope-intercept form, the first step to solve for y would be to

• subtract 2x from each side

• subtract 8 from each side

• add 8 to each side

• divide each side by 4