What is the equation of the line that contains the point (–5, –1) and has a slope of 4? Write in slope-intercept form. A. y = 4x – 19 B. y = 4x + 19 C. y = 4x –

Question

 

I need help I don't understand

 

Answer 1

The equation of a line is in the form y=mx+b , where m is slope and b is y-intercept.

 

The slope is already give.  The equation of the line so far is

 

y = 4x + b

 

 

Next, we plug in the values of the coordinates into the equation to find b.

 

-1 = 4(-5) + b

 

-1 = -20 + b

 

19 = b

 

 

The equation of the line is

 

y = 4x + 19

 

 

Another way to solve this is to plug in the x value of the given coordinate into the answer choices to see which one gives you a y value of -1.