# Maths

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16 years ago
#1
Hello!

i have a diffiulty with the following. Can you help?

Find the values of m and c if the straight line y = mx + c passes through the given points:

(-3,13) and (1,1)

Best regards,

SALEM
0
16 years ago
#2
work out the gradient first, y2 - y1 / x2 - x1

that will give you m

then put in 1 set of cooridinates and the value you have for m in the equation y = mx + c, use that to find C, once you have c write the equation of the line as y = (m value)x + (c value)

For the example u have given it would be 1-13 / 1+3 = -12/4
= -3 SO m = -3

then you know y = -3x + c now put in one of the set of coords

1 = -3(1) + c , therefor c = 4

now put c and m in the y = mx +c and you have got y=-3x+4
0
16 years ago
#3
?????? glad I dont touch maths
0
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