SOLUTION: I want to make sure I am doing this correctly in order to instruct my son. Write the equation of a line through the given point with the given slope. (-3,1); m=3 y = mx + b

Question 26319: I want to make sure I am doing this correctly in order to instruct my son. Write the equation of a line through the given point with the given slope.
(-3,1); m=3
y = mx + b y = 3x + 1, is this correct?
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
hi, the full method of working is as follows:

y=mx+c is the standard form for a straight line...doesn't matter that you wrote b...just that c is the term usually used.

Anyhow...m is gradient, so we have y=3x+c

we need to find the value of c. To do this, we need to know x and y at a specific point, which we do... (-3,1).

So, 1 = 3(-3) + c
--> 1 = -9 + c
--> 10 = c

so the equation of the straight line is y = 3x + 10.

Basically, i think you wrote the 1 into the equation for some reason from the co-ordinates. This is definitely incorrect! :-)

jon.

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