Question

Martin’s class is organizing a concert to raise money for a charity the graph below shows the relationship between the number of tickets sold,n,the money collected,m.

Answer 1

`m=20n`

Explanation:

Let

`A(5,100),B(10,200)`

step 1

Find the slope

The formula to calculate the slope between two points is equal to

`slope=(m2-m1)/(n2-n1)`

substitute the values

`slope=(200-100)/(10-5)=20`

step 2

Find the equation of the line into slope-point

`m-m1=slope(n-n1)`

with the slope and the point A

`m-100=20(n-5)`

`m=20n-100+100`

`m=20n`