Find two points on the graph and plug them into the formula.
(0,0) and (1,4) are the easiest.
(y2-y1)/(x2-x1)=m
(4-0)/(1-0)=m
4/1=1
m=4
Yes. an equation can be modeled as y = 10x where y is the price and x is the amount of hours. y = 10x is linear as there are no exponents, variables in the denominator, or two variables being multiplied together. all linear equations are always proportional in some way, so it is proportional.
For every one stamp James has Roy has twice as much. So the ratio would be 1/2
Finish what There is not enough information
The first step for simplifying this fraction is to divide the numerator and denominator by 6.
![\frac{102\div6}{300\div6}](https://tex.z-dn.net/?f=%20%5Cfrac%7B102%5Cdiv6%7D%7B300%5Cdiv6%7D%20)
Divide the numbers on the numerator (top) of the fraction.
![\frac{17}{300\div6}](https://tex.z-dn.net/?f=%20%5Cfrac%7B17%7D%7B300%5Cdiv6%7D%20)
Lastly,, divide the numbers on the denominator (bottom) of the fraction to get your final answer.
![\frac{17}{50}](https://tex.z-dn.net/?f=%20%5Cfrac%7B17%7D%7B50%7D%20)
Let me know if you have any further questions.
:)