How would I go about doing this question?

Soldato
Joined
14 Oct 2011
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5,740
Location
Kent
Hey guys, I need a bit of help

There is this question. A straight line passes through the points (3,7) and (21,09). Apply y = mx + c and use simultaneous equations to find the equation of the line.

I am not sure what to do when they say, "Apply y = mx + c"

Does it mean that I need to sub in X and Y into y = mx + c

Which will make 7 = 3m + c

And 9 = 21m + c?

I am only asking because I am not sure what to do, and the teacher told us to attempt this question, and I don't remember covering it last year, and we have definitely not covered it this year.
 
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