19 - Coordinate Geometry

Question 1

Just because the y-intercept is positive

Answer 1

doesn’t mean that the whole line doesn’t reach a negative area

Question 2

Answer 2

Question 3

Answer 3

Question 4

Answer 4

Question 5

Answer 5

Question 6

Answer 6

Question 7

Answer 7

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

Equation of a circle

Answer 11

(x-a)² + (y-b)² = r²

(x,y) = coordinates on the circumference

(h,k) = center point

r= radius of the circle

Question 12

Reflection over y=x

Answer 12

Switch the x and y coordinates

Question 13

Reflect over y=-x

Answer 13

Switch x and y AND flip signs

Question 14

Answer 14

Question 15

Answer 15

Question 16

Answer 16

Question 17

Answer 17

Question 18

Answer 18

Question 19

Answer 19

Question 20

Answer 20

Question 21

Answer 21

Question 22

Answer 22

Question 23

Answer 23

Question 24

Answer 24

Question 25

Answer 25

Use the coordinates for the the two side angles, they form two 30-60-90 triangles with the 3, 4, 5 triplet. Two sides = 5, then use the distance formula for the third side.