ⓐ We will compare the slopes and intercepts of the two lines.
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| The first equation is already in slope-intercept form. |
{y6x−2y==3x−112y=3x−1 |
| Write the second equation in slope-intercept form. |
6x−2y−2y−2−2yy====12−6x+12−2−6x+123x−6 |
| Find the slope and intercept of each line. |
ymb===3x−13−1ymb===3x−63−6 |
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Since the slopes are the same and y-intercepts are different, the lines are parallel. |
A system of equations whose graphs are parallel lines has no solution and is inconsistent and independent.
ⓑ We will compare the slope and intercepts of the two lines.
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{2x+yx−5y==−35 |
| Write both equations in slope–intercept form. |
2x+yy==−3−2x−3x−5y−5y−5−5yy====5−x+5−5−x+551x−1 |
| Find the slope and intercept of each line. |
ymb===−2x−3−2−3ymb===51x−151−1 |
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Since the slopes are different, the lines intersect. |
A system of equations whose graphs are intersect has 1 solution and is consistent and independent.