The direct proportional graph passes through point A (5,8). Find this function by formula.
| August 3, 2021 | education
Direct proportionality is given by the formula y = kx. The graph goes through the origin.
Since the graph passes through point A (5; 8), we substitute y = kx x = 5 and y = 8 in the formula.
8 = 5k,
k = 8: 5,
k = 1.6.
The function is given by the formula y = 1.6x.
Answer: y = 1.6x.
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