Apair of linear equations is shown:

y = −x + 1
y = 2x + 4

which of the following statements best explains the steps to solve the pair of equations graphically?

a. on a graph, plot the line y = −x + 1, which has y-intercept = −1 and slope = 1, and
y = 2x + 4, which has y-intercept = 2 and slope = 4, and write the coordinates of the point of intersection of the two lines as the solution.

b. on a graph, plot the line y = −x + 1, which has y-intercept = 1 and slope = 1, and
y = 2x + 4, which has y-intercept = 1 and slope = 4, and write the coordinates of the point of intersection of the two lines as the solution.

c. on a graph, plot the line y = −x + 1, which has y-intercept = 1 and slope = −1, and
y = 2x + 4, which has y-intercept = −2 and slope = 2, and write the coordinates of the point of intersection of the two lines as the solution.

d. on a graph, plot the line y = −x + 1, which has y-intercept = 1 and slope = −1, and y = 2x + 4, which has y-intercept = 4 and slope = 2, and write the coordinates of the point of intersection of the two lines as the solution.