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

y=4x+5

Step-by-step explanation:

Slope intercept form is y=mx+b. m is slope and b is the y-intercept. The first thing you need to do is substitute the numbers you have into the equation: 9=4 (1) + b.

Then you simplify: 9=4+b.

Now you need to figure out b. Ask yourself, what plus 4 equals 9? The answer is 5.

Next, you take the numbers for x and y out of the equation and replace them with letters: y=4x+5. That's your answer.