Question

A line has gradient 5. M and N are two points on this line. M is the point (x, 8) and N is the point (k, 23). Find an expression for x in terms of k (with working)

Answer 1

Answer:

see gradient means slope

so

y2-y1/x2-x1

is the slope format

so

5= 23-8/k-x

5=15/k-x

k-x=3

so

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