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If , , and , then the regression equation of on is:
If $\bar{x} = 28$, $\bar{y} = 32$, $b_{yx} = 1.8$ and $b_{xy} = 0.5$, then the regression equation of $y$ on $x$ is:
- a$y = 1.8x - 18.4$
- b$y = 2.2x + 10$
- c$y = 1.8x + 18.4$
- d$y = 2.2x + 18$
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From ISC 2026 Improvement Mathematics Paper 1, question 19(ii).