Answer: 
Step-by-step explanation:
- Slope intercept form has a general formula of

- m represents the slope of the line
- b represents the value of the lines y-intercept
- the equation must be rearranged into the general formula by isolating for 'y'

- to remove the x from the left side of the equation the opposite operation must be done to both sides

- the negative and positive x cancel out on the left side, leaving us with the equation with y by itself
- now you can rearrange to put the equation into

Final Answer: 
You would fill in 9 for x so your equation would be 2(9)+3 and you would then get 21. Therefore the answer is f(x)=21
The ratio is 1:4
She could use...
4 gems and 16 flowers... 4 x 4 = 16
7 stickers and 28 glue dots... 7 x 4 = 28
Y=1/2x+4 this is the way I was taught let me know if It makes since to you