Unit 3 Quiz

What is the slope?

• 6/5

• -6/5

• -5/6

• 5/6

In 5 minutes, a plane is 1 mile above the earth. In 8 minutes, a plane is 3 miles above the earth. If x is minutes and y is miles, what is the rate of change?

• 2/3

• 3/2

• -2/3

• -3/2

A line has a slope of -2 and passes through the point (4, -6). Write the equation in standard form.

• -6 = -2(4) + b .

• y= -2x + 2

• 2x + y = 2

• y + 2x = 2

Write an equation for the line in slope-intercept form.

• y = 2x + 6

• -3x + 6y = 12

• y = -2x + 6

• y = 1/2x + 6

A line passes through the point ( -1, 3) and has a slope of 4. Write the equation in point-slope form.

• y= 4x + 7

• y + 1 = 4 ( x - 3 )

• y - 3 = 4 ( x + 1)

• y + 3 = 4 ( x - 1 )

A line is represented by the equation 2x - 3y = 12. What is the y-intercept?

• (0,6)

• (-6,0)

• (-4, 0)

• (0, -4)