Question

A pair of linear equations is shown below:

y = –2x + 3
y = –4x – 1

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

Answer 1

Which of the following statements best explains the steps to solve the pair of equations graphically?
Graph the first equation, which has slope = 3 and y-intercept = –2, graph the second equation, which has slope = –1 and y-intercept = –4, and find the point of intersection of the two lines. Graph the first equation, which has slope = –3 and y-intercept = 2, graph the second equation, which has slope = 1 and y-intercept = 4, and find the point of intersection of the two lines. Graph the first equation, which has slope = –2 and y-intercept = 3, graph the second equation, which has slope = –4 and y-intercept = –1, and find the point of intersection of the two lines. Graph the first equation, which has slope = 2 and y-intercept = –3, graph the second equation, which has slope = 4 and y-intercept = 1, and find the point of intersection of the two lines.

Answer 2

The difference between the statements is how they identified the slope and y-intercept of each line. If you can do that based on the equations, then you'll be able to pick the right statement.

Slope-intercept form is y = mx + b where m is the slope and b is the y-intercept.

Can you identify the slope and y-intercept of each line?