Trigonometry Answers

Find the center and radius of the given circle and graph it.

15. x^2+y^2+10y+21=0

Write the standard form of the equation of the circle with the given center and radius.

14. center (-2, 0) and r = 3

Find the slope of the line that is a) parallel and b) perpendicular to the given line.

12. X=-8

13. Y=10

Give the slope and y-intercept of the given line and then graph it.

10. Y=3

11. X+2=0

Give the slope and y-intercept of the given line and then graph it.

8. 2x-3y=6

9. Y=-2x

Write an equation for the line in point/slope form and slope/intercept form that has the given condition.

6. Passes through (3,2) and is parallel to 2x-y=4


7. Passes through (-1,-1) and is perpendicular to y=5/2x+3

Write an equation for the line in point/slope form and slope/intercept form that has the given condition.

4. Slope= 3/2 and passes through the origin


5. X-intercept=4 and Y-intercept=-3

Find the slope of the straight line that passes through the given points or state that the slope is undefined. Then indicate if the line through the points rises (left to right), falls (left to right), is horizontal, or is vertical.

1. (7,4) and (1,1)

2. (-3,4) and (2,-1)

3. (-5,3) and (-5,2)

Determine if the given relation is function or not. Give its domain and range.

16. (-1,2),(1,3),(-1,4),(2,5)

17. (1,1),(2,2),(3,3),(4,4)

Find the center and radius of the given circle and graph it.

15. x^2+y^2+10y+21=0