Question 511639
y = mx+b
.
y = 4x + b
.
Use the point (4,3) to find b.
.
3 = 4*4 + b
-13 = b
.
y = 4x -13
.
y =7
.
7 = 4x -13
20 = 4x
x = 5
.
{{{graph(500,500,-15,15,-15,15,4*x-13)}}}