Answer: (1.7, 3.1)
Explanation:
As an estimate, the x-coordinate does not lie perfectly on 1 or 2. So we have to read in between.
Is it closer to 1 or 2? Ask yourself.
It's closer to 2. Our x is now 1.7.
As a second estimate, the y-coordinate does not lie perfectly on 3, but just above the 3.
Our y is now 3.1.
Also: do you own a graphing calculator?
Go to y = and put in the equation they gave you.
y = -1/2x + 4 and see which choice lies on the line in the "table" option.
I have a Texas Instruments (TI-84) Graphing Calculator, and this is how I would have approached it.