This time you need to rearrange the formula first (unless you can do it in your head?) a good start can be x = 0 and y = 0 for 2y = x + 10 rearranges to y = 0.5x + 5 which gives (0, 5), (-10, 0) and (almost) at random choose x = 2 (2, 7) with 0.5y = x – 2.5 rearrange to get y = 2x - 5 (0, -5), (-2.5, 0) and (3, 1)
Finding points of intersection use your calculator! select Equations, Simultaneous and two unknowns just like you did for 3.15! 188x + 290y = 2315 120x + 400y = 1800 should give you x = 10 and y = 1.5
I can plot linear equations – Nulake page 5 – 6 – work sheet I can find the points of intersection
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