1. What is the equation, in slope-intercept form, of the line that passes through (0, 5) and has a slope of - 1?

y = - x - 5

y = x + 5

y = - x + 5

y = x - 5

2. An electrical company uses the function f (h) = 15h + 75 to calculate the total repair bill, f (h), for h number of hours worked. Find h if f (h) = $225.

10 hours

15 hours

3,375 hours

3,450 hours

3. Solve the following for y: 4x + 2y = - 2

y = - 2x + 1

y = 2x + 1

y = - 2x - 1

y = 2x - 1

Question

Mathematics

Spotty

23 May, 16:16

1. What is the equation, in slope-intercept form, of the line that passes through (0, 5) and has a slope of - 1?

y = - x - 5

y = x + 5

y = - x + 5

y = x - 5

2. An electrical company uses the function f (h) = 15h + 75 to calculate the total repair bill, f (h), for h number of hours worked. Find h if f (h) = $225.

10 hours

15 hours

3,375 hours

3,450 hours

3. Solve the following for y: 4x + 2y = - 2

y = - 2x + 1

y = 2x + 1

y = - 2x - 1

y = 2x - 1

+1

Answers (1)

Know the Answer?

Mollie Cherry · Answer 1

1. The slope is the number that is multiplied by X, since the slope is - 1, when multiplied by X you would get - X, the y intercept is the given y coordinate (5), so the equation would be y = - x+5

2. Replace f (h) with 225 and solve for h:

225 = 15h + 75

Subtract 75 from each side:

150 = 15h

Divide both sides by 15:

h = 10 hours

3. 4x + 2y = - 2

subtract 4x from each side"

2y = - 4x - 2

Divide both sides by 2:

y = - 4x-2 / 2

y = - 2x - 1