2 Question Progress
Homework Progress
16/30 Marks
a)
James sets off from home on his bike. The graph shows his journey.
b)
a) What is James' average speed
on his outward journey?
c)
50
45
40
b) How long does he stop for?
35
30
Distance
from
home
in km
c) What is James' average speed
on his homeward journey?
25
20
15
10
5
2pm 3pm 4pm 5pm 6pm 7pm 8pm
Time

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.