5. straight line graphs

Question 1

line equations

Answer 1

y= mx+c

or

y- y1 = m(x - x1)

Question 2

gradient of a line

Answer 2

y2 - y1/ x2 - x1

Question 3

parallel lines have …. gradient

Answer 3

same

Question 4

perpendicular lines have …. gradients

ex
line 1 gradient m

Answer 4

negative reciprocal

ex
line 2 gradient: -1/m

Question 5

distance of 2 coordinates formula

Answer 5

d= root (x2-x1)^2 + (y2-y1)^2