Answer:
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.
Step-by-step explanation:
Each equation is in the slope-intercept form:
y = mx + b
in which m is the slope and b is the y-intercept.
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Matching this form to the given equations, you find that ...
first equation: m = slope = -1; b = y-intercept = 1
second equation: m = slope = 2; b = y-intercept = 4
Comparing these values to those in the answer choices makes it clear which one is correct (see above).
