"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+b∙xy=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)