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Mathematics 15 Online
OpenStudy (anonymous):

....

OpenStudy (anonymous):

The general equation of a straight line is \(y=mx+c\) where m is the gradient and c is the y-intercept. The line you have is \(y=-4x\), so m=-4 and c=0. Can you continue from here?

OpenStudy (anonymous):

so is it a?

OpenStudy (anonymous):

Almost, notice the minus sign in the gradient. So the slope is negative (as x increases, y decreases).

OpenStudy (anonymous):

Can you have another go using that information?

OpenStudy (anonymous):

Yes, the last one :) Do you understand?

OpenStudy (anonymous):

Well done :) no problem.

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