Question

The straight line l is perpendicular to the line
y+3x = 5
and passes through the point P(4, 2). Find
the x-intercept of l.

Answer 1

first find the slope of a line perpendicular to a slope of 3. do you know how to do that

Answer 2

1/3

Answer 3

its actually -1/3. a perpendicular line has a slope of the negative reciprocal of the original slope.

Answer 4

then put it into y = mx + b form where m is you new slope and y and x are the point its crossing and you can solve for b and have a whole line

Answer 5

got it thanks

Answer 6

your welcome :)