How to do question 4. a and b?

enter image source here
enter image source here

1 Answer
Feb 3, 2018

y=2.25x
d=24622m

Explanation:

y=mx+b
b=0, because it goes through the origin.
m=y1y2x1x2, which is true for any two points which are included by the function. In this case we have the points:
p1(00)
p2(1022.5)
m=22.50100=2.25
y=2.25x+0=2.25x

For the distance we use pythagoras:

a2+b2=c2
a=10,b=22.5,c=unknown
102+22.52=c2
606.25=c2
Than, we take the root.
606.25=c24.622km(24622m)