A line passes through (5 ,0 )(5,0) and (7 ,9 )(7,9). A second line passes through (3 ,6 )(3,6). What is one other point that the second line may pass through if it is parallel to the first line?

1 Answer
Dec 22, 2017

(2,3/2)(2,32)

Explanation:

"establish the equation of the parallel line"establish the equation of the parallel line

"the equation of a line in "color(blue)"slope-intercept form "the equation of a line in slope-intercept form is.

•color(white)(x)y=mx+bxy=mx+b

"where m is the slope and b the y-intercept"where m is the slope and b the y-intercept

"to calculate m use the "color(blue)"gradient formula"to calculate m use the gradient formula

color(red)(bar(ul(|color(white)(2/2)color(black)(m=(y_2-y_1)/(x_2-x_1))color(white)(2/2)|)))

"let "(x_1,y_1)=(5,0)" and "(x_2,y_2)=(7,9)

rArrm=(9-0)/(7-5)=9/2

• " parallel lines have equal slopes"

rArr"slope of parallel line "=9/2

rArry=9/2x+b color(blue)" is the partial equation"

"to find b substitute "(3,6)" into the partial equation"

6=27/2+brArrb=-15/2

rArry=9/2x-15/2larrcolor(blue)"equation of parallel line"

"choose any value for x and substitute into the equation"

x=2toy=9-15/2=3/2

"another point on the line is "(2,3/2)