SOLUTION: work out the equation of a line which has agradient of -2 which pass through (1,7)

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Question 1118460: work out the equation of a line which has agradient of -2 which pass through (1,7)
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
"gradient", like slope?

Some uknown point (x,y) and a known point (1,7) on the line, and slope is -2:


%28y-7%29%2F%28x-1%29=-2-----------There! Worked-out.

You might want the equation in a different form.
highlight_green%28y-7=-2%28x-1%29%29-----point-slope form, after multiplying both sides by x-1.

y-7=-2x%2B1

y=-2x%2B1%2B7

highlight%28y=-2x%2B8%29------slope-intercept form