Practice and Problem-Solving Exercises

A Practice

See Problem 1.

Write an equation in point-slope form of the line that passes through the given point and with the given slope m.

8. ( 3 , − 4 ) ; m = 6 open 3 comma negative 4 close semicolon m equals 6
9. ( 4 , 2 ) ; m = − 5 3 open 4 comma 2 close semicolon m equals negative , 5 thirds
10. ( − 2 , − 7 ) ; m = 4 5 open negative 2 comma negative 7 close semicolon m equals , 4 fifths
11. ( 4 , 0 ) ; m = − 1 open 4 comma 0 close semicolon m equals negative 1

See Problem 2.

Graph each equation.

12. y + 3 = 2 ( x − 1 ) y plus 3 equals 2 open x minus 1 close
13. y − 1 = − 3 ( x + 2 ) y minus 1 equals negative 3 open x plus 2 close
14. y + 5 = − ( x + 2 ) y plus 5 equals negative open x plus 2 close
15. y − 2 = 4 9 ( x − 3 ) y minus 2 equals , 4 ninths , open x minus 3 close

See Problem 3.

Write an equation in point-slope form for each line.

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