What is the answer of (1, 9); slope 4 on a graph?

y = 4x + 5

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = 4, thus

y = 4x + c ← is the partial equation

To find c substitute (1, 9) into the partial equation

9 = 4 + c ⇒ c = 9 - 4 = 5

y = 4x + 5 ← equation of line

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