Write an equation of a line with the given slope and y-intercept. m = –2, b = 4 a. y = –2x 4 b. y equals negative one half x plus 4 c. y = 4x – 2 d. y = –2x – 4

One of the many ways of writing the equations of lines is the slope - intercept form. This is generally expressed as, 
                                 y = mx + b
where m is the slope and b is the y-intercept. 
Substituting the known values of m and b to the equation above, 
                                 y = -2x + 4

Thus, the answer is letter A. 

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