2 Answers

Max West · Answer 1 · 2022-03-14T06:51:53+0000

Answer:

3

Explanation:

Hello There!

First things first, we should find the rate of change / slope

given two points we can find the slope by using the slope formula which is

(let m be slope)

m = (y_2-y_2)/(x_2-x_2)

To find the slope all we have to do is plug in the points

(1,5),(2,10)

remember the first numbers in an ordered pair are the x values and the second numbers are the y values

we also plug in the points of the second ordered pair first so

$m=(10-5)/(2-1) \\10-5=5\\2-1=1\\m=(5)/(1) or5$

Knowing the slope we can create an equation to find the x value (a)

y=5x

given the y value we plug in y and solve for x

15=5x

divide each side by 5

15/5=3

5x/5=x

we're left with

x=3

so we can conclude when y =15 x = 3 therefore 3 is your answer

Please log in or register to add a comment.