Question

The slope of a line is -4, and the y-intercept is -3. What is the equation of the line written in slope-intercept form?

Answer 1

a. y = -4x - 3

b. y = -4x + 3

c. y = 4x - 3

Answer 2

y = mx + b

where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis.
To write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. This is the value of m in the equation. Next, find the coordinates of the y -intercept--this should be of the form (0, b) . The y - coordinate is the value of b in the equation.

Finally, write the equation, substituting numerical values in for m and b . Check your equation by picking a point on the line (not the y -intercept) and plugging it in to see if it satisfies the equation.

Answer 3

y = -4x - 3