The correct graph is option 3.
Given,
Sarah buys x no. of roses and y no. of carnations.
The cost of each roses be $3, so cost of x roses be 3 x .
And the cost of each carnations be $1, so cost of y carnations be y.
The total cost will be [tex]3x + y.[/tex]
But as given in question she can spend no more than $75, so we have the inequality [tex]3x + y \leq 75[/tex].
Writing the above equation as a line we have [tex]y\leq 75-3x[/tex].
So graph of above line will be a solid line with a negative slope and the shaded part will be below that line so the value of y goes in between 0 and 75.
Now, value of x when y is o will be calculated from [tex]y\leq 75-3x[/tex].
[tex]0\leq 75-3x[/tex]
[tex]3x\leq 75[/tex]
[tex]x\leq \frac{75}{3}[/tex]
[tex]x\leq 25[/tex]
Now we have values of x in between 0 and 25.
here we have y in between 0 and 75 with a negative slope and x in between 0 and 25. so the shaded part will be below that line goes in between 0 and 75 on y axis . option 3 has shaded part in between 0 and 75 on y axis so the correct option is 3.
For more details on coordinate geometry follow the link:
https://brainly.com/question/18269861